US2931671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seals for gas carrying pipe lines
Assignee: Individual
•
Filing: 1957-03-25
•
Granted: 1960-04-05
•
Expires: 1977-03-25
Abstract
No abstract record available.
Inventors
- 👤 Howard K Beeley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:30
CPC Classifications
F; F16; F16L; F16L17/00; F16L17/02; F01; F01N; F01N13/00; F01N13/18; F01N13/1805; F01N13/1811; F01N13/1827; F16L21/00; F16L21/02; F16L21/035
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1963-04-05 | 1963-10-05 | 1964-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-05 | 1967-10-05 | 1968-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-05 | 1971-10-05 | 1972-04-05 | $7700.00 | Window Closed / Lapsed |