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Patent US2881805A successfully refreshed from Google Patents.
US2881805A
Expired / Lapsed
US
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Pipe seal assemblies
Assignee: Individual
•
Filing: 1956-05-01
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Granted: 1959-04-14
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Expires: 1976-05-01
Abstract
No abstract record available.
Inventors
- 👤 William R Cobb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:35
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/16; F16L55/168; F16L55/17; Y; Y10; Y10T; Y10T24/00; Y10T24/14; Y10T24/1412; Y10T24/1414; Y10T292/00; Y10T292/20; Y10T292/221; Y10T292/223
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US443952A
Cited
US624770A
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US1478172A
Cited
US1911126A
Cited
US2120961A
Cited
US2173399A
Cited
US2361186A
Cited
US2424542A
Cited
US2438234A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-13 | 1962-10-13 | 1963-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-13 | 1966-10-13 | 1967-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-13 | 1970-10-13 | 1971-04-14 | $7700.00 | Window Closed / Lapsed |