Patent US2354108A successfully refreshed from Google Patents.
Patent US2157049A successfully refreshed from Google Patents.
US2157049A
Expired / Lapsed
US
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Process of treating cast polymeric resin sheets
Assignee: Rohm and Haas Co
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Filing: 1937-04-15
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Granted: 1939-05-02
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Expires: 1957-04-15
Abstract
No abstract record available.
Inventors
- 👤 Willard F Bartoe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:24
CPC Classifications
B; B29; B29C; B29C71/00; B29C71/02; B29C2071/022; B29K; B29K2033/00; B29K2033/04; B29K2033/12
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) | 1942-05-01 | 1942-10-31 | 1943-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-05-01 | 1946-10-31 | 1947-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-05-01 | 1950-10-31 | 1951-05-02 | $7700.00 | Window Closed / Lapsed |