Granted Patent
Utility
Small
US 6,540,487
· Confirmation No. 3710
PRESSURE EXCHANGER WITH AN ANTI-CAVITATION PRESSURE RELIEF SYSTEM IN THE END COVERS
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⬇ PDF
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Code | Description | Pages | ||
|---|---|---|---|---|---|
| 2020-10-05 | N570 |
Communication - Re: Power of Attorney (PTOL-308) | 1 | View | |
| 2020-10-05 | N570 |
Communication - Re: Power of Attorney (PTOL-308) | 1 | View | |
| 2020-09-30 | PA.. |
Power of Attorney | 2 | View | |
| 2020-09-30 | N417 |
Electronic Filing System Acknowledgment Receipt | 2 | View | |
| 2020-09-30 | R3.73 |
Assignee showing of ownership per 37 CFR 3.73 | 3 | View | |
| 2016-07-13 | N570 |
Communication - Re: Power of Attorney (PTOL-308) | 1 | View | |
| 2016-07-13 | N570 |
Communication - Re: Power of Attorney (PTOL-308) | 1 | View | |
| 2016-07-08 | PA.. |
Power of Attorney | 2 | View | |
| 2016-07-08 | MFEE.C.AD |
Maintenance Fee Address Change | 2 | View | |
| 2016-07-08 | N417 |
Electronic Filing System Acknowledgment Receipt | 2 | View | |
| 2016-07-08 | R3.73 |
Assignee showing of ownership per 37 CFR 3.73 | 3 | View | |
| 2016-07-08 | C.AD |
Change of Address | 2 | View | |
| 2013-03-27 | N570 |
Communication - Re: Power of Attorney (PTOL-308) | 1 | View | |
| 2013-03-27 | N570 |
Communication - Re: Power of Attorney (PTOL-308) | 1 | View | |
| 2013-03-05 | PA.. |
Power of Attorney | 1 | View | |
| 2013-03-05 | R3.73 |
Assignee showing of ownership per 37 CFR 3.73 | 2 | View | |
| 2013-03-05 | N417 |
Electronic Filing System Acknowledgment Receipt | 2 | View | |
| 2009-03-10 | N570 |
Communication - Re: Power of Attorney (PTOL-308) | 1 | View | |
| 2009-03-10 | N570 |
Communication - Re: Power of Attorney (PTOL-308) | 1 | View | |
| 2009-03-03 | PA.. |
Power of Attorney | 1 | View | |
| 2009-03-03 | R3.73 |
Assignee showing of ownership per 37 CFR 3.73 | 1 | View | |
| 2009-03-03 | N417 |
Electronic Filing System Acknowledgment Receipt | 2 | View | |
| 2008-06-18 | COCIN |
Request for Certificate of Correction | 8 | View | |
| 2008-06-18 | N417 |
Electronic Filing System Acknowledgment Receipt | 2 | View | |
| 2001-08-31 | TRNA |
Transmittal of New Application | 2 | View | |
| 2001-08-31 | DRW |
Drawings-only black and white line drawings | 9 | View | |
| 2001-04-10 | TRNA |
Transmittal of New Application | 5 | View | |
| 2001-04-10 | SPEC |
Specification | 17 | View | |
| 2001-04-10 | CLM |
Claims | 7 | View | |
| 2001-04-10 | ABST |
Abstract | 1 | View | |
| 2001-04-10 | DRW |
Drawings-only black and white line drawings | 9 | View | |
| 2001-04-10 | OATH |
Oath or Declaration filed | 5 | View |
Inventors
Thanos Polizos
Virginia Beach, VA
Thomas Babcock
Virginia Beach, VA
Leif J. Hauge
Virginia Beach, VA
Ragnar A. Hermanstad
Hitra, NORWAY
Attorneys & Agents of Record
Classification
USPC
417/64
Prosecution
- Examiner
- GRAY, MICHAEL KUHN
- Art Unit
- 3746
- Customer No.
- 28221
- Docket No.
- 38708.23 L0019
- Confirmation No.
- 3710
Foreign Priority
20001877
·
2000-04-11
·
NORWAY
Publication
- Pub. No.
- US20020025264A1
- Pub. Date
- 2002-02-28
Patent Term Adjustment
-120days
No related applications found.
RELEASE OF SECURITY INTEREST
Recorded 2022-01-05
SECURITY AGREEMENT
Recorded 2012-06-21
ASSIGNMENT OF ASSIGNOR'S INTEREST
Recorded 2001-04-10
from
HAUGE TECHNOLOGIES, INC., FKA ENERGENCY RECOVERY INTER'S, A DELAWARE CORPORATION,
HAUGE, LIEF J.
ASSIGNMENT OF ASSIGNOR'S INTEREST
Recorded 2001-04-10
ASSIGNMENT OF ASSIGNOR'S INTEREST
Recorded 2001-04-10
ASSIGNMENT OF ASSIGNOR'S INTEREST
Recorded 2001-04-10
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Quick Facts
- Patent No.
- US 6,540,487
- App. No.
- 09/833,252
- Filed
- 2001-04-10
- Granted
- 2003-04-01
- Pub. No.
- US20020025264A1
- Examiner
- GRAY, MICHAEL KUHN
- Art Unit
- 3746
- PTA
- -120 days
External Links