Patent US2776851A successfully refreshed from Google Patents.
US2776851A
Expired / Lapsed
US
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Sealing systems
Assignee: Individual
•
Filing: 1953-06-01
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Granted: 1957-01-08
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Expires: 1973-06-01
Abstract
No abstract record available.
Inventors
- 👤 August H Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:09
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/36; F16J15/363
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1769030A
Cited
US1826373A
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US2089570A
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US2274137A
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US2251020A
Cited
US2298463A
Cited
US2338873A
Cited
GB601296A
Cited
US2608425A
Cited
US2586739A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-08 | 1960-07-09 | 1961-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-08 | 1964-07-09 | 1965-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-08 | 1968-07-09 | 1969-01-08 | $7700.00 | Window Closed / Lapsed |