US2791289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of forming fissured fiber acoustical tile and product thereof
Assignee: Simpson Timber Co
•
Filing: 1952-12-10
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Granted: 1957-05-07
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Expires: 1972-12-10
Abstract
No abstract record available.
Inventors
- 👤 Don A Proudfoot
- 👤 Donald K Meissner
- 👤 Arthur T Walton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:13
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/82; E04B1/8227; E04B1/84; E04B1/8409; E04B2001/8457; E04B2001/8461; E04B2001/8476; E04B2001/848
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2388880A
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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) | 1960-05-06 | 1960-11-05 | 1961-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-06 | 1964-11-05 | 1965-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-06 | 1968-11-05 | 1969-05-07 | $7700.00 | Window Closed / Lapsed |