US2446771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of imparting surface effects to thermoplastic sheets
Assignee: Boston Woven Hose and Rubber Co
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Filing: 1946-12-31
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Granted: 1948-08-10
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Expires: 1966-12-31
Abstract
No abstract record available.
Inventors
- 👤 Thomas M Knowland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:22
CPC Classifications
B; B29; B29C; B29C59/00; B29C59/02; B29C59/04; B29C65/00; B29C65/02; B29C65/18; B29C66/00; B29C66/80; B29C66/83; B29C66/834; B29C66/8341; B29C66/83411; B29C66/83421; B44; B44B; B44B5/00; B44B5/02; B44B5/026; B44B5/028; B29C66/8351; B29C66/83511
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-10 | 1952-02-09 | 1952-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-10 | 1956-02-09 | 1956-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-10 | 1960-02-09 | 1960-08-10 | $7700.00 | Window Closed / Lapsed |