Patent US2937708A successfully refreshed from Google Patents.
US2937708A
Expired / Lapsed
US
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Sound deadening device
Assignee: Individual
•
Filing: 1958-03-20
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Granted: 1960-05-24
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Expires: 1978-03-20
Abstract
No abstract record available.
Inventors
- 👤 Jr Francis M Cottle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:37
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/18; F01N13/1805; F01N1/00; F01N1/08; F01N1/10; F02; F02B; F02B75/00; F02B75/34; Y; Y10; Y10S; Y10S181/00; Y10S181/404
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1115704A
Cited
US1360311A
Cited
US2280953A
Cited
US2323101A
Cited
US2618499A
Cited
US2593054A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-24 | 1963-11-23 | 1964-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-24 | 1967-11-23 | 1968-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-24 | 1971-11-23 | 1972-05-24 | $7700.00 | Window Closed / Lapsed |