US3472150A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-closing flexible damper
Assignee: Strawsine Manufacturing Co
•
Filing: 1967-10-19
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Granted: 1969-10-14
•
Expires: 1987-10-19
Abstract
No abstract record available.
Inventors
- 👤 Frederick W Strawsine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:37
CPC Classifications
F; F04; F04D; F04D25/00; F04D25/02; F04D25/08; F04D25/12; F04D25/14; B; B60; B60H; B60H1/00; B60H1/00457; B60H1/00464; F24; F24F; F24F7/00; F24F7/02; F24F7/025; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7879; Y10T137/7888; Y10T137/789
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2684621A
Cited
US3012495A
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US3212425A
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US3228418A
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US3306179A
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US3303995A
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US3386368A
Cited
US3401624A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-13 | 1973-04-14 | 1973-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-13 | 1977-04-14 | 1977-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-13 | 1981-04-14 | 1981-10-14 | $7700.00 | Window Closed / Lapsed |