US2997140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary damper
Assignee: Houdaille Industries Inc
•
Filing: 1957-07-08
•
Granted: 1961-08-22
•
Expires: 1977-07-08
Abstract
No abstract record available.
Inventors
- 👤 Rumsey Rollin Douglas
- 👤 William J Carter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:42
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/10; F16F9/14; F16F9/145
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US435678A
Cited
US1914677A
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US1876092A
Cited
US2138511A
Cited
US2286516A
Cited
US2683505A
Cited
US2818142A
Cited
US2800203A
Cited
US2808131A
Cited
US2851128A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |