US2487367A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Damper
Assignee: Individual
•
Filing: 1945-08-31
•
Granted: 1949-11-08
•
Expires: 1965-08-31
Abstract
No abstract record available.
Inventors
- 👤 Trusts Bank Of Commerce And
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:04
CPC Classifications
F; F24; F24F; F24F11/00; F24F11/70; F24F11/72; F24F11/74; F24F11/76
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2187767A
Cited
US1181443A
Cited
US1185347A
Cited
US2072617A
Cited
US2120938A
Cited
US2181427A
Cited
US2117529A
Cited
US2121625A
Cited
US2238807A
Cited
US2297872A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-07 | 1953-05-09 | 1953-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-07 | 1957-05-09 | 1957-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-07 | 1961-05-09 | 1961-11-08 | $7700.00 | Window Closed / Lapsed |