Granted Patent
Utility
US 6,629,476
· Confirmation No. 9355
BI-CENTER BIT ADAPTED TO DRILL CASING SHOE
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⬇ PDF
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Code | Description | Pages | ||
|---|---|---|---|---|---|
| 2004-05-14 | LET. |
Miscellaneous Incoming Letter | 2 | View | |
| 2004-04-27 | NFEE |
Notice of Additional Fee Due | 1 | View | |
| 2002-01-16 | TRNA |
Transmittal of New Application | 2 | View | |
| 2002-01-16 | DRW |
Drawings-only black and white line drawings | 10 | View | |
| 2001-10-02 | TRNA |
Transmittal of New Application | 2 | View | |
| 2001-10-02 | SPEC |
Specification | 12 | View | |
| 2001-10-02 | CLM |
Claims | 4 | View | |
| 2001-10-02 | ABST |
Abstract | 1 | View | |
| 2001-10-02 | DRW |
Drawings-only black and white line drawings | 10 | View | |
| 2001-10-02 | OATH |
Oath or Declaration filed | 8 | View |
Inventors
Coy M. Fielder
Cypress, TX
Rogerio H. Silva
Spring, TX
Attorneys & Agents of Record
Classification
USPC
76/108.2
E21B10/265
E21B10/43
Prosecution
- Examiner
- PAYER, HWEI-SIU C
- Art Unit
- 3724
- Customer No.
- 26932
- Docket No.
- DPII:058
- Confirmation No.
- 9355
Publication
- Pub. No.
- US20020092378A1
- Pub. Date
- 2002-07-18
Patent Term Adjustment
-136days
from
WELLS FARGO BANK
CORRECTIVE ASSIGNMENT TO CORRECT THE RECEIVING PARTIES NAME, PREVIOUSLY RECORDED ON REEL 018463 FRAME 0103.
Recorded 2006-11-07
from
WELLS FARGO BANK
RELEASE OF PATENT SECURITY AGREEMENT
Recorded 2006-09-18
ASSIGNMENT OF ASSIGNOR'S INTEREST
Recorded 2006-07-24
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Quick Facts
- Patent No.
- US 6,629,476
- App. No.
- 09/969,444
- Filed
- 2001-10-02
- Granted
- 2003-10-07
- Pub. No.
- US20020092378A1
- Examiner
- PAYER, HWEI-SIU C
- Art Unit
- 3724
- PTA
- -136 days
External Links