US2859830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vibratory flexible silencers
Assignee: Individual
•
Filing: 1955-07-22
•
Granted: 1958-11-11
•
Expires: 1975-07-22
Abstract
No abstract record available.
Inventors
- 👤 Henry S Hoffar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:04
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/12; F01N1/00; F01N1/16; F01N1/22; F16; F16L; F16L55/00; F16L55/04
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-10 | 1962-05-12 | 1962-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-10 | 1966-05-12 | 1966-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-10 | 1970-05-12 | 1970-11-11 | $7700.00 | Window Closed / Lapsed |