US3755499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester high polymer synthetic paper for writing
Assignee: Mitsubishi Chemical Corp
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Filing: 1971-05-24
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Granted: 1973-08-28
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Expires: 1991-05-24
Abstract
Abstract SYNTHETIC WRITING SHEET MADE FROM A LINEAR POLYESTER AND A HIGH POLYMER HAVING A HIGHER GLASS TRANSITION POINT THAN THAT OF THE LINEAR POLYESTER BY MIXING THEM UNIFORMLY, FORMING THE POLYMER MIXTURE INTO FILM, AND STRETCHING THE FILM.
Inventors
- 👤 I Heijo
- 👤 S Wakamatsu
- 👤 H Wada
- 👤 H Nagamatsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:50
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/795; G03C1/7954; B; B41; B41M; B41M1/00; B41M1/26; B41M1/30; C; C08; C08L; C08L67/00; C08L67/02
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) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |