US2645508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary mechanical seal
Assignee: Crane Packing Co
•
Filing: 1949-11-14
•
Granted: 1953-07-14
•
Expires: 1969-11-14
Abstract
No abstract record available.
Inventors
- 👤 Frank E Payne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:38
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/36
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2263178A
Cited
US2192395A
Cited
US2200413A
Cited
US2328160A
Cited
US2365351A
Cited
US2404690A
Cited
US2479178A
Cited
US2462280A
Cited
US2489545A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-13 | 1957-01-12 | 1957-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-13 | 1961-01-12 | 1961-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-13 | 1965-01-12 | 1965-07-14 | $7700.00 | Window Closed / Lapsed |