Patent US3818952A successfully refreshed from Google Patents.
Patent US3433453A successfully refreshed from Google Patents.
US3433453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid seals
Assignee: Dowty Hydraulic Units Ltd
•
Filing: 1965-11-19
•
Granted: 1969-03-18
•
Expires: 1985-11-19
Abstract
No abstract record available.
Inventors
- 👤 John C E Flint
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:06
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2601990A
Cited
US3011757A
Cited
US2989985A
Cited
US3026084A
Cited
US3188049A
Cited
US3215163A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-17 | 1972-09-16 | 1973-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-17 | 1976-09-16 | 1977-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-17 | 1980-09-16 | 1981-03-18 | $7700.00 | Window Closed / Lapsed |