Patent US3513009A successfully refreshed from Google Patents.
US3513009A
Expired / Lapsed
US
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Method of forming fissured acoustical panel
Assignee: National Gypsum Co
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Filing: 1965-12-27
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Granted: 1970-05-19
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Expires: 1985-12-27
Abstract
No abstract record available.
Inventors
- 👤 Gale E Sauer
- 👤 Arthur C Austin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:52
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/82; E04B1/84; E04B1/86; E04B2001/8457; E04B2001/8461; E04B2001/8476; E04B2001/848
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1587699A
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US1983180A
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US2340535A
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US2747470A
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US2910040A
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US2717538A
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US3077945A
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US3061056A
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US3149005A
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US3391013A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-18 | 1973-11-17 | 1974-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-18 | 1977-11-17 | 1978-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-18 | 1981-11-17 | 1982-05-19 | $7700.00 | Window Closed / Lapsed |