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US2401642A
Expired / Lapsed
US
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Extrusion of thermoplastic material
Assignee: Rohm and Haas Co
•
Filing: 1942-10-23
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Granted: 1946-06-04
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Expires: 1962-10-23
Abstract
No abstract record available.
Inventors
- 👤 James R Hiltner
- 👤 Jr William Berlinghof
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:29
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/88; B29C48/90; B29C48/03; B29C48/06; B29C48/07; B29C48/08; B29C48/09; B29C48/10; B29C48/911; B29C48/905; Y; Y10; Y10S; Y10S264/00; Y10S264/13
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) | 1949-06-03 | 1949-12-03 | 1950-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-06-03 | 1953-12-03 | 1954-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-06-03 | 1957-12-03 | 1958-06-04 | $7700.00 | Window Closed / Lapsed |