US2908515A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaft seal
Assignee: Individual
•
Filing: 1955-08-09
•
Granted: 1959-10-13
•
Expires: 1975-08-09
Abstract
No abstract record available.
Inventors
- 👤 Belton A Copp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:25
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/40; Y; Y10; Y10S; Y10S277/00; Y10S277/908; Y10S277/927
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB704032A
Cited
US1109826A
Cited
US1518279A
Cited
US1943578A
Cited
US1996780A
Cited
US2175868A
Cited
US2466025A
Cited
US2684274A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-12 | 1963-04-13 | 1963-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-12 | 1967-04-13 | 1967-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-12 | 1971-04-13 | 1971-10-13 | $7700.00 | Window Closed / Lapsed |