Patent US2153357A successfully refreshed from Google Patents.
US2153357A
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Acoustic damping material
Assignee: AT&T Inc
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Filing: 1936-11-13
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Granted: 1939-04-04
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Expires: 1956-11-13
Abstract
No abstract record available.
Inventors
- 👤 Edward C Wente
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:29
CPC Classifications
G; G10; G10K; G10K11/00; G10K11/18; G10K11/20; E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/82; E04B1/84; E04B1/8409; G10K11/16; E04B2001/8263; E04B2001/8272; E04B2001/8414; E04B2001/8423; E04B2001/8442
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) | 1942-04-03 | 1942-10-03 | 1943-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-04-03 | 1946-10-03 | 1947-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-04-03 | 1950-10-03 | 1951-04-04 | $7700.00 | Window Closed / Lapsed |