Patent US1956564A successfully refreshed from Google Patents.
US1956564A
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Method of producing plastic sheeting
Assignee: DuPont Viscoloid Co
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Filing: 1930-09-30
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Granted: 1934-05-01
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Expires: 1950-09-30
Abstract
No abstract record available.
Inventors
- 👤 Paul W Crane
- 👤 Reuben T Fields
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:32
CPC Classifications
B; B29; B29D; B29D7/00; B29D7/01; C; C08; C08J; C08J5/00; C08J5/18; C08L; C08L1/00; C08L1/08; C08L1/10; C08L1/12; C08L1/16; C08L1/18; C08L1/26; C08L1/30; C08J2301/00; C08J2301/08; C08J2301/10; C08J2301/12; C08J2301/16; C08J2301/18; C08J2301/26; C08J2301/30
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) | 1937-04-30 | 1937-10-30 | 1938-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-04-30 | 1941-10-30 | 1942-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-04-30 | 1945-10-30 | 1946-05-01 | $7700.00 | Window Closed / Lapsed |