US3021822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary actuator seal
Assignee: Houdaille Industries Inc
•
Filing: 1957-08-28
•
Granted: 1962-02-20
•
Expires: 1977-08-28
Abstract
No abstract record available.
Inventors
- 👤 Rumsey Rollin Douglas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:08
CPC Classifications
F; F16; F16L; F16L27/00; F16L27/08; F16J; F16J15/00; F16J15/54; F16J15/545
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB520237A
Cited
US2372710A
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US2349170A
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US2520306A
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US2509672A
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US2870748A
Cited
USRE24440E
Cited
US2892645A
Cited
US2806451A
Cited
US2798462A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-19 | 1965-08-21 | 1966-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-19 | 1969-08-21 | 1970-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-19 | 1973-08-21 | 1974-02-20 | $7700.00 | Window Closed / Lapsed |