US2459121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustical tile
Assignee: United States Gypsum Co
•
Filing: 1943-09-17
•
Granted: 1949-01-11
•
Expires: 1963-09-17
Abstract
No abstract record available.
Inventors
- 👤 Grant S Willey
- 👤 Orecutt W Frost
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:15
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/82; E04B1/84; E04B1/86; E04B2001/8457; E04B2001/8476; E04B2001/848; E04B2001/849
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1483365A
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US1628090A
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US1751249A
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US1929117A
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US2029441A
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US2160638A
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US2301538A
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US2337525A
Cited
US2413568A
Cited
US2410413A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-01-11 | 1952-07-12 | 1953-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-01-11 | 1956-07-12 | 1957-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-01-11 | 1960-07-12 | 1961-01-11 | $7700.00 | Window Closed / Lapsed |