US2744591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for preventing leakage around fastener heads
Assignee: FORMING MACHINE Co OF AME
•
Filing: 1951-02-07
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Granted: 1956-05-08
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Expires: 1971-02-07
Abstract
No abstract record available.
Inventors
- 👤 Alvan D Simpson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:41
CPC Classifications
F; F16; F16B; F16B33/00; F16B33/004; Y; Y10; Y10S; Y10S411/00; Y10S411/915
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US314075A
Cited
DE459202C
Cited
US1083876A
Cited
GB231366A
Cited
US1805937A
Cited
GB420109A
Cited
US1967841A
Cited
GB578357A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-08 | 1959-11-07 | 1960-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-08 | 1963-11-07 | 1964-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-08 | 1967-11-07 | 1968-05-08 | $7700.00 | Window Closed / Lapsed |