US2392578A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming rigid sheets of polymerized unsaturated compounds
Assignee: PPG Industries Inc
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Filing: 1941-06-16
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Granted: 1946-01-08
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Expires: 1961-06-16
Abstract
No abstract record available.
Inventors
- 👤 Albert G Chenicek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:21
CPC Classifications
B; B29; B29C; B29C39/00; B29C39/003; B29C39/006; Y; Y10; Y10S; Y10S125/00; Y10S125/901; Y10S425/00; Y10S425/053
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1949-01-07 | 1949-07-09 | 1950-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-01-07 | 1953-07-09 | 1954-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-01-07 | 1957-07-09 | 1958-01-08 | $7700.00 | Window Closed / Lapsed |