IP Library › Granted Patent US 6,848,791
Granted Patent B2
US 6,848,791 · App. 10/320,839 · Granted Feb 1, 2005

Single-curvature placido plate with additional surfaces

View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 6,848,791
App. No.
10/320,839
Granted
Feb 1, 2005
Kind
B2
Abstract

A placido device 10 includes a single-curvature, semi-circular screen 12 having an opaque covering which is interrupted along its surface to form an illuminated pattern. A flat top 14 is attached to the top of the screen 12 and angled from the screen front 28 towards the screen bottom 26 . Also, a flat bottom 16 is attached to the bottom of the screen 12 and angled from the screen front 28 towards the screen top 24.

Claims (22)

1. An apparatus for use in analyzing a patient's cornea, the apparatus comprising:

a single-curvature, semi-circular screen having an opaque covering which is interrupted along its surface to form an illuminated pattern, wherein the screen presents front, top, and bottom surfaces;

a flat top attached to the top of the screen and angled from the screen front towards the screen bottom;

a flat bottom attached to the bottom of the screen and angled from the screen front towards the screen top; and

wherein each of the flat top and flat bottom also has opaque covering interrupted along its surface to form an illuminated pattern.

2. The apparatus of claim 1 , wherein the flat top and bottom are each angled at approximately 19° from horizontal.

3. The apparatus of claim 1 , wherein the patterns of the screen, the flat top, and the flat bottom are detachable.

4. A placido apparatus for use in analyzing a patient's eye, comprising:

a placido screen; and

a removable light array contained within a housing removable connected to the placido screen for providing a desired type of light source for directly illuminating the patient's eye.

5. The invention of claim 4 , wherein the removable array further includes an annular light array surrounding a central cylindrical through-hole.

6. The invention of claim 5 , wherein the light array is formed of at least one of light emitting diodes (LEDs), infrared light sources, and incandescent light sources.

7. An apparatus for use in analyzing a patient's cornea, the apparatus comprising:

a single-curvature, semi-circular screen having an opaque covering which is interrupted along its surface to form an illuminated pattern, wherein the screen presents front, top, and bottom surfaces;

a flat top attached to the top of the screen and angled from the screen front towards the screen bottom;

a flat bottom attached to the bottom of the screen and angled from the screen front towards the screen top;

wherein each of the flat top and flat bottom also has opaque covering interrupted along its surface to form an illuminated pattern; and

a removable light array connected to the screen.

8. The apparatus of claim 7 , wherein the flat top and bottom are each angled at approximately 19° from horizontal.

9. The apparatus of claim 7 , wherein the patterns of the screen, the flat top, and the flat bottom are detachable.

10. The invention of claim 7 , wherein the removable array further includes an annular light array surrounding a central cylindrical through hole.

11. The invention of claim 10 , wherein the light array is formed of at least one of light emitting diodes (LEDs), infrared light sources, and incandescent light sources.

Assignments (19)
RELEASE OF SECURITY INTEREST Recorded Nov 20, 2025
From: THE BANK OF NEW YORK MELLON, AS NOTES COLLATERAL AGENT
To: ATON PHARMA, INC.; BAUSCH & LOMB INCORPORATED; BAUSCH & LOMB PHARMA HOLDINGS CORP.; COMMONWEALTH LABORATORIES, LLC; DOW PHARMACEUTICAL SCIENCES, INC.; ECR PHARMACEUTICALS CO., INC.; LABORATOIRE CHAUVIN S.A.S.; MEDICIS PHARMACEUTICAL CORPORATION; ONPHARMA INC.; ORAPHARMA, INC.; PRECISION DERMATOLOGY, INC.; SALIX PHARMACEUTICALS, LTD.; SALIX PHARMACEUTICALS, INC.; SANTARUS, INC.; SOLTA MEDICAL, INC.; SYNERGETICS USA, INC.; TECHNOLAS PERFECT VISION GMBH; VALEANT CANADA LP; VALEANT PHARMACEUTICALS INTERNATIONAL; VALEANT PHARMACEUTICALS INTERNATIONAL, INC.; VALEANT PHARMACEUTICALS NORTH AMERICA LLC; WIRRA IP PTY LIMITED; VALEANT PHARMA POLAND SP. Z O.O.; VALEANT PHARMACEUTICALS LUXEMBOURG S.A R.L.; VALEANT PHARMACEUTICALS IRELAND LIMITED
Reel/Frame 073637/0001 →
RELEASE OF SECURITY INTEREST Recorded Nov 20, 2025
From: THE BANK OF NEW YORK MELLON, AS NOTES COLLATERAL AGENT
To: BAUSCH HEALTH AMERICAS, INC.; BAUSCH & LOMB INCORPORATED; BAUSCH HEALTH US, LLC; SOLTA MEDICAL, INC.; MEDICIS PHARMACEUTICAL CORPORATION; SALIX PHARMACEUTICALS, INC.; SALIX PHARMACEUTICALS, LTD.; SANTARUS, INC.; ORAPHARMA, INC.; PRECISION DERMATOLOGY, INC.
Reel/Frame 073637/0126 →
RELEASE OF SECURITY INTEREST Recorded Nov 20, 2025
From: THE BANK OF NEW YORK MELLON, AS NOTES COLLATERAL AGENT
To: BAUSCH & LOMB INCORPORATED; BAUSCH HEALTH US, LLC; SOLTA MEDICAL, INC.; MEDICIS PHARMACEUTICAL CORPORATION; SALIX PHARMACEUTICALS, INC.; SALIX PHARMACEUTICALS, LTD.; SANTARUS, INC.; ORAPHARMA, INC.; PRECISION DERMATOLOGY, INC.; BAUSCH HEALTH AMERICAS, INC.
Reel/Frame 073654/0242 →
ASSIGNMENT OF SECURITY INTEREST IN PATENTS PREVIOUSLY RECORDED AT REEL/FRAME (059913/0548) Recorded Aug 14, 2025
From: CITIBANK, N.A., AS RESIGNING AGENT
To: JPMORGAN CHASE BANK, N.A., AS SUCCESSOR AGENT
Reel/Frame 072469/0091 →
RELEASE OF SECURITY INTEREST Recorded Apr 8, 2025
From: BARCLAYS BANK PLC, AS COLLATERAL AGENT
To: SOLTA MEDICAL, INC.; PRECISION DERMATOLOGY, INC.; BAUSCH HEALTH IRELAND LIMITED (F/K/A/ VALEANT PHARMACEUTICALS IRELAND LIMITED); SALIX PHARMACEUTICALS, INC.; SALIX PHARMACEUTICALS, LTD; SANTARUS, INC.; MEDICIS PHARMACEUTICAL CORPORATION; HUMAX PHARMACEUTICAL S.A.; SOLTA MEDICAL IRELAND LIMITED; BAUSCH & LOMB MEXICO, S.A. DE C.V.; BAUSCH+LOMB OPS B.V.; BAUSCH HEALTH AMERICAS, INC.; BAUSCH HEALTH COMPANIES INC.; BAUSCH HEALTH HOLDCO LIMITED; BAUSCH HEALTH MAGYARORSZAG KFT (A/K/A BAUSCH HEALTH HUNGARY LLC); BAUSCH HEALTH POLAND SPOLKA Z OGRANICZONA ODPOWIEDZIALNOSCIA (F/K/A VALEANT PHARMA POLAND SPOLKA Z OGRANICZONA ODPOWIEDZIALNOSCIA); BAUSCH HEALTH US, LLC; BAUSCH HEALTH, CANADA INC. / SANTE BAUSCH, CANADA INC.; ICN POLFA RZESZOW SPOLKA AKCYJNA (A/K/A ICN POLFA RZESZOW S.A.); ORAPHARMA, INC.; PRZEDSIEBIORSTWO FARMACEUTYCZNE JELFA SPOLKA AKCYJNA (A/K/A PRZEDSIEBIORSTWO FARMACEUTYCZNE JELFA S.A.); SOLTA MEDICAL DUTCH HOLDINGS B.V.; V-BAC HOLDING CORP.; VRX HOLDCO LLC; 1261229 B.C. LTD.; 1530065 B.C. LTD.
Reel/Frame 070778/0199 →
OMNIBUS PATENT SECURITY RELEASE AGREEMENT (REEL/FRAME 043251/0932) Recorded Nov 2, 2022
From: THE BANK OF NEW YORK MELLON
To: BAUSCH & LOMB INCORPORATED; TECHNOLAS PERFECT VISION GMBH
Reel/Frame 061872/0099 →
OMNIBUS PATENT SECURITY RELEASE AGREEMENT (REEL/FRAME 045444/0634) Recorded Nov 2, 2022
From: THE BANK OF NEW YORK MELLON
To: BAUSCH & LOMB INCORPORATED; LABORATOIRE CHAUVIN S.A.S.; TECHNOLAS PERFECT VISION GMBH; THE UNITED STATES OF AMERICA, AS REPRESENTED BY THE SECRETARY, DEPARTMENT OF HEALTH AND HUMAN SERVICES
Reel/Frame 061872/0295 →
OMNIBUS PATENT SECURITY RELEASE AGREEMENT (REEL/FRAME 048556/0758) Recorded Nov 2, 2022
From: THE BANK OF NEW YORK MELLON
To: BAUSCH & LOMB INCORPORATED; BAUSCH HEALTH COMPANIES INC.; TECHNOLAS PERFECT VISION GMBH; THE UNITED STATES OF AMERICA, AS REPRESENTED BY THE SECRETARY, DEPARTMENT OF HEALTH AND HUMAN SERVICES
Reel/Frame 061872/0484 →
OMNIBUS PATENT SECURITY RELEASE AGREEMENT (REEL/FRAME 056811/0814) Recorded Nov 2, 2022
From: THE BANK OF NEW YORK MELLON
To: BAUSCH & LOMB INCORPORATED
Reel/Frame 061872/0669 →
OMNIBUS PATENT SECURITY RELEASE AGREEMENT (REEL/FRAME 059121/0001) Recorded Nov 2, 2022
From: THE BANK OF NEW YORK MELLON
To: BAUSCH & LOMB INCORPORATED
Reel/Frame 061873/0001 →
RELEASE OF SECURITY INTEREST IN SPECIFIED PATENTS (REEL/FRAME 034749/0689) Recorded Oct 26, 2022
From: BARCLAYS BANK PLC
To: BAUSCH & LOMB INCORPORATED; UNIVERSITY OF ROCHESTER
Reel/Frame 061778/0146 →
RELEASE OF SECURITY INTEREST IN SPECIFIED PATENTS (REEL/FRAME 045444/0299) Recorded Oct 26, 2022
From: BARCLAYS BANK PLC
To: BAUSCH & LOMB INCORPORATED; TECHNOLAS PERFECT VISION GMBH; THE UNITED STATES OF AMERICA, AS REPRESENTED BY THE SECRETARY, DEPARTMENT OF HEALTH AND HUMAN SERVICES; PF CONSUMER HEALTHCARE 1 LLC; LABORATOIRE CHAUVIN S.A.S.
Reel/Frame 061779/0001 →
RELEASE OF SECURITY INTEREST IN SPECIFIED PATENTS (REEL/FRAME 031156/0508) Recorded Oct 26, 2022
From: BARCLAYS BANK PLC
To: BAUSCH & LOMB INCORPORATED
Reel/Frame 061778/0446 →
PATENT SECURITY AGREEMENT Recorded May 10, 2022
From: BAUSCH & LOMB INCORPORATED
To: CITIBANK, N.A. AS COLLATERAL AGENT
Reel/Frame 059913/0548 →
SECURITY AGREEMENT Recorded Feb 10, 2022
From: BAUSCH & LOMB INCORPORATED; BAUSCH HEALTH US, LLC; SOLTA MEDICAL, INC.; MEDICIS PHARMACEUTICAL CORPORATION; SALIX PHARMACEUTICALS, INC.; SALIX PHARMACEUTICALS, LTD.; SANTARUS, INC.; ORAPHARMA, INC.; PRECISION DERMATOLOGY, INC.; BAUSCH HEALTH AMERICAS, INC.
To: THE BANK OF NEW YORK MELLON
Reel/Frame 059121/0001 →
SECURITY INTEREST Recorded Jun 8, 2021
From: BAUSCH & LOMB INCORPORATED; BAUSCH HEALTH US, LLC; SOLTA MEDICAL, INC.; MEDICIS PHARMACEUTICAL CORPORATION; SALIX PHARMACEUTICALS, INC.; SALIX PHARMACEUTICALS, LTD.; SANTARUS, INC.; ORAPHARMA, INC.; PRECISION DERMATOLOGY, INC.; BAUSCH HEALTH AMERICAS, INC.
To: THE BANK OF NEW YORK MELLON, AS NOTES COLLATERAL AGENT
Reel/Frame 056811/0814 →
SECURITY INTEREST Recorded Mar 11, 2019
From: BAUSCH HEALTH AMERICAS, INC.; BAUSCH & LOMB INCORPORATED; BAUSCH HEALTH US, LLC; SOLTA MEDICAL, INC.; MEDICIS PHARMACEUTICAL CORPORATION; SALIX PHARMACEUTICALS, INC.; SALIX PHARMACEUTICALS, LTD.; SANTARUS, INC.; ORAPHARMA, INC.; PRECISION DERMATOLOGY, INC.
To: THE BANK OF NEW YORK MELLON, AS NOTES COLLATERAL AGENT
Reel/Frame 048556/0758 →
SECURITY INTEREST Recorded Feb 26, 2018
From: ATON PHARMA, INC.; BAUSCH & LOMB INCORPORATED; BAUSCH & LOMB PHARMA HOLDINGS CORP.; COMMONWEALTH LABORATORIES, LLC; DOW PHARMACEUTICAL SCIENCES, INC.; ECR PHARMACEUTICALS CO., INC.; LABORATOIRE CHAUVIN S.A.S.; MEDICIS PHARMACEUTICAL CORPORATION; ONPHARMA INC.; ORAPHARMA, INC.; PRECISION DERMATOLOGY, INC.; SALIX PHARMACEUTICALS, LTD.; SALIX PHARMACEUTICALS, INC.; SANTARUS, INC.; SOLTA MEDICAL, INC.; SYNERGETICS USA, INC.; TECHNOLAS PERFECT VISION GMBH; VALEANT CANADA LP; VALEANT PHARMACEUTICALS INTERNATIONAL; VALEANT PHARMACEUTICALS INTERNATIONAL, INC.; VALEANT PHARMACEUTICALS NORTH AMERICA LLC; WIRRA IP PTY LIMITED; VALEANT PHARMA POLAND SP. Z O.O.; VALEANT PHARMACEUTICALS LUXEMBOURG S.A R.L.; VALEANT PHARMACEUTICALS IRELAND LIMITED
To: THE BANK OF NEW YORK MELLON, AS COLLATERAL AGENT
Reel/Frame 045444/0634 →
SECURITY INTEREST Recorded Feb 26, 2018
From: ATON PHARMA, INC.; BAUSCH & LOMB INCORPORATED; BAUSCH & LOMB PHARMA HOLDINGS CORP.; COMMONWEALTH LABORATORIES, LLC; DOW PHARMACEUTICAL SCIENCES, INC.; ECR PHARMACEUTICALS CO., INC.; LABORATOIRE CHAUVIN S.A.S.; MEDICIS PHARMACEUTICAL CORPORATION; ONPHARMA INC.; ORAPHARMA, INC.; PRECISION DERMATOLOGY, INC.; SALIX PHARMACEUTICALS, LTD.; SALIX PHARMACEUTICALS, INC.; SANTARUS, INC.; SOLTA MEDICAL, INC.; SYNERGETICS USA, INC.; TECHNOLAS PERFECT VISION GMBH; VALEANT CANADA LP; VALEANT PHARMACEUTICALS INTERNATIONAL; VALEANT PHARMACEUTICALS INTERNATIONAL, INC.; VALEANT PHARMACEUTICALS NORTH AMERICA LLC; WIRRA IP PTY LIMITED; VALEANT PHARMA POLAND SP. Z O.O.; VALEANT PHARMACEUTICALS LUXEMBOURG S.A R.L.; VALEANT PHARMACEUTICALS IRELAND LIMITED
To: BARCLAYS BANK PLC, AS COLLATERAL AGENT
Reel/Frame 045444/0299 →