US2877860A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apertured pliable resilient damper wall silencer
Assignee: Individual
•
Filing: 1956-07-23
•
Granted: 1959-03-17
•
Expires: 1976-07-23
Abstract
No abstract record available.
Inventors
- 👤 Hoffar Henry Stonestreet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:27
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/12; F01N1/00; F01N1/08; F01N1/083; F01N1/16; F01N1/22; F16; F16L; F16L55/00; F16L55/04; F01N2490/00; F01N2490/08; Y; Y10; Y10S; Y10S116/00; Y10S116/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1274943A
Cited
US1542829A
Cited
US2073335A
Cited
FR797112A
Cited
US2372587A
Cited
US2629393A
Cited
US2625235A
Cited
GB684987A
Cited
US2688979A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-16 | 1962-09-15 | 1963-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-16 | 1966-09-15 | 1967-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-16 | 1970-09-15 | 1971-03-17 | $7700.00 | Window Closed / Lapsed |