US2899023A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Damper with thermostatic valve
Assignee: Houdaille Industries Inc
•
Filing: 1957-03-27
•
Granted: 1959-08-11
•
Expires: 1977-03-27
Abstract
No abstract record available.
Inventors
- 👤 Rumsey Rollin Douglas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:04
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/32; F16F9/50; F16F9/52
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA517644A
Cited
US2043465A
Cited
US2161811A
Cited
US2240644A
Cited
US2378417A
Cited
US2742113A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-10 | 1963-02-09 | 1963-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-10 | 1967-02-09 | 1967-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-10 | 1971-02-09 | 1971-08-11 | $7700.00 | Window Closed / Lapsed |