Granted Patent
Utility
US 6,644,411
· Confirmation No. 8426
TUBING HANGER WITH FLAPPER VALVE
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Code | Description | Pages | ||
|---|---|---|---|---|---|
| 2017-03-03 | OATH |
Oath or Declaration filed | 11 | View | |
| 2003-09-18 | IFEE |
Issue Fee Payment (PTO-85B) | 1 | View | |
| 2003-09-18 | LET. |
Miscellaneous Incoming Letter | 2 | View | |
| 2003-09-18 | DRW |
Drawings-only black and white line drawings | 4 | View | |
| 2001-04-18 | TRNA |
Transmittal of New Application | 2 | View | |
| 2001-04-18 | SPEC |
Specification | 10 | View | |
| 2001-04-18 | CLM |
Claims | 5 | View | |
| 2001-04-18 | ABST |
Abstract | 1 | View | |
| 2001-04-18 | DRW |
Drawings-only black and white line drawings | 4 | View | |
| 2001-04-18 | OATH |
Oath or Declaration filed | 2 | View |
Inventors
Dewey Craig Compton
Richmond, TX
Edwin R. Knerr
Houston, TX
Attorneys & Agents of Record
Classification
USPC
166/368
Prosecution
- Examiner
- BEACH, THOMAS A
- Art Unit
- 3671
- Docket No.
- 303.131
- Confirmation No.
- 8426
Publication
- Pub. No.
- US20020153143A1
- Pub. Date
- 2002-10-24
Patent Term Adjustment
-140days
No related applications found.
CHANGE OF NAME
Recorded 2017-03-03
ASSIGNMENT OF ASSIGNOR'S INTEREST
Recorded 2001-04-18
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Quick Facts
- Patent No.
- US 6,644,411
- App. No.
- 09/837,097
- Filed
- 2001-04-18
- Granted
- 2003-11-11
- Pub. No.
- US20020153143A1
- Examiner
- BEACH, THOMAS A
- Art Unit
- 3671
- PTA
- -140 days
External Links