Patent US3381969A successfully refreshed from Google Patents.
US3381969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal packer construction
Assignee: Dresser Industries Inc
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Filing: 1965-02-01
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Granted: 1968-05-07
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Expires: 1985-02-01
Abstract
No abstract record available.
Inventors
- 👤 Morgan L Crow
- 👤 Marion D Kilgore
- 👤 Harry E Simpson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:12
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/1208; E21B33/1216
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
IN A WELL PACKER; A TUBULAR SUPPORT MEMBER; A GENERALLY CYLINDRICAL PACKING MEANS DISPOSED ON SAID TUBULAR SUPPORT MEMBER, SAID PACKING MEANS COMPRISING A PACKER MEMBER FORMED FROM ASBESTOS BRAID ENCIRCLING SAID TUBULAR SUPPORT MEMBER, A BOOT MEMBER FORMED FROM ASBESTOS MATERIAL ENCIRCLING SAID PACKER MEMBER PROVIDING A PROTECTIVE COVER THEREOVER, AND MEANS RETAINING SAID BOOT MEMBER OVER SAID PACKER MEMBER; A BACK-UP RING ENCIRCLING SAID TUBULAR SUPPORT MEMBER ADJACENT EACH END OF SAID PACKER MEMBER, EACH SAID BACK-UP RING INCLUDING A CUP-LIKE MEMBER OF DEFORMABLE MATERIAL ENCOMPASSING A PORTION OF THE EXTERIOR OF SAID PACKING MEANS, AND A DEFORMABLE SUPPORT RING SUPPORTINGLY ENGAGING EACH SAID CUP-LIKE MEMBER, EACH SUPPORT RING INCLUDING AN ANNULAR FLANGE DISPOSED GENERALLY TRANSVERSELY RELATIVE TO THE AXIS OF AND ENCIRCLING SAID TUBULAR SUPPORT MEMBER, A WALL PORTION EXTENDING GENERALLY PARALLEL TO THE AXIS OF SAID TUBULAR SUPPORT MEMBER AND RELATIVELY TOWARD SAID PACKING MEANS;
Claim 2
Dependent Claim
149 words
IN A WELL PACKER; A TUBULAR SUPPORT MEMBER; A GENERALLY CYLINDRICAL PACKING MEANS DISPOSED ON SAID TUBULAR SUPPORT MEMBER, SAID PACKING MEANS COMPRISING A PACKER MEMBER FORMED FROM ASBESTOS BRAID ENCIRCLING SAID TUBULAR SUPPORT MEMBER, A BOOT MEMBER FORMED FROM ASBESTOS MATERIAL ENCIRCLING SAID PACKER MEMBER PROVIDING A PROTECTIVE COVER THEREOVER, AND MEANS RETAINING SAID BOOT MEMBER OVER SAID PACKER MEMBER; A BACK-UP RING ENCIRCLING SAID TUBULAR SUPPORT MEMBER ADJACENT EACH END OF SAID PACKER MEMBER, EACH SAID BACK-UP RING INCLUDING A CUP-LIKE MEMBER OF DEFORMABLE MATERIAL ENCOMPASSING A PORTION OF THE EXTERIOR OF SAID PACKING MEANS, AND A DEFORMABLE SUPPORT RING SUPPORTINGLY ENGAGING EACH SAID CUP-LIKE MEMBER, EACH SUPPORT RING INCLUDING AN ANNULAR FLANGE DISPOSED GENERALLY TRANSVERSELY RELATIVE TO THE AXIS OF AND ENCIRCLING SAID TUBULAR SUPPORT MEMBER, A WALL PORTION EXTENDING GENERALLY PARALLEL TO THE AXIS OF SAID TUBULAR SUPPORT MEMBER AND RELATIVELY TOWARD SAID PACKING MEANS;
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-07 | 1971-11-06 | 1972-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-07 | 1975-11-06 | 1976-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-07 | 1979-11-06 | 1980-05-07 | $7700.00 | Window Closed / Lapsed |