Patent US3524763A successfully refreshed from Google Patents.
US3524763A
Expired / Lapsed
US
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Acoustical grid panels
Assignee: National Gypsum Co
•
Filing: 1966-12-27
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Granted: 1970-08-18
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Expires: 1986-12-27
Abstract
No abstract record available.
Inventors
- 👤 Salvatore R Taravella
- 👤 Walter L Russ Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:55
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/82; E04B1/84; E04B1/86; E04C; E04C2/00; E04C2/02; E04C2/10; E04C2/24; E04C2/243; E04B2001/8457; E04B2001/8461; Y; Y10; Y10T; Y10T428/00; Y10T428/27; Y10T428/273; Y10T428/277; Y10T428/31504; Y10T428/31942; Y10T442/00; Y10T442/20; Y10T442/2369
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1939082A
Cited
US1937679A
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US2485080A
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US2919453A
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US2813046A
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US3243340A
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US3281252A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-17 | 1974-02-16 | 1974-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-17 | 1978-02-16 | 1978-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-17 | 1982-02-16 | 1982-08-18 | $7700.00 | Window Closed / Lapsed |