US2901751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Noise attenuator
Assignee: Individual
•
Filing: 1957-07-03
•
Granted: 1959-09-01
•
Expires: 1977-07-03
Abstract
No abstract record available.
Inventors
- 👤 Robert S Gales
- 👤 Beitscher Herbert Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:23
CPC Classifications
A; A42; A42B; A42B3/00; A42B3/04; A42B3/16; A42B3/166; Y; Y10; Y10S; Y10S2/00; Y10S2/03
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB336286A
Cited
GB449905A
Cited
US2340872A
Cited
US2625683A
Cited
US2619639A
Cited
US2593892A
Cited
US2805419A
Cited
US2763005A
Cited
US2867813A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-31 | 1963-03-02 | 1963-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-31 | 1967-03-02 | 1967-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-31 | 1971-03-02 | 1971-09-01 | $7700.00 | Window Closed / Lapsed |