US2882990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound absorbing units and method of making same
Assignee: United States Gypsum Co
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Filing: 1956-11-01
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Granted: 1959-04-21
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Expires: 1976-11-01
Abstract
No abstract record available.
Inventors
- 👤 Robert M Mustoe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:57
CPC Classifications
G; G10; G10K; G10K11/00; G10K11/16; Y; Y10; Y10S; Y10S493/00; Y10S493/968
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) | 1962-04-20 | 1962-10-20 | 1963-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-20 | 1966-10-20 | 1967-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-20 | 1970-10-20 | 1971-04-21 | $7700.00 | Window Closed / Lapsed |