US1348828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for sound insulation
Assignee: Submarine Signal Co
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Filing: 1919-02-01
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Granted: 1920-08-03
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Expires: 1939-02-01
Abstract
No abstract record available.
Inventors
- 👤 Reginald A Fessenden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:55
CPC Classifications
G; G10; G10K; G10K11/00; G10K11/18; G10K11/20; G10K11/205; B; B63; B63B; B63B1/00; B63B1/32; B63B1/34; B63B1/38; Y; Y02; Y02T; Y02T70/00; Y02T70/10; Y10; Y10S; Y10S15/00; Y10S15/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1923-08-03 | 1924-02-02 | 1924-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1927-08-03 | 1928-02-02 | 1928-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1931-08-03 | 1932-02-02 | 1932-08-03 | $7700.00 | Window Closed / Lapsed |