Patent US2664041A successfully refreshed from Google Patents.
US2664041A
Expired / Lapsed
US
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Damper assembly
Assignee: Individual
•
Filing: 1950-02-01
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Granted: 1953-12-29
•
Expires: 1970-02-01
Abstract
No abstract record available.
Inventors
- 👤 Erland R Twede
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:38
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/08; F24F13/10; F24F13/14; F24F13/142
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US192181A
Cited
US1735760A
Cited
US1706338A
Cited
DE668164C
Cited
DE706489C
Cited
US2403291A
Cited
US2513644A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-28 | 1957-06-29 | 1957-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-28 | 1961-06-29 | 1961-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-28 | 1965-06-29 | 1965-12-29 | $7700.00 | Window Closed / Lapsed |