US3812063A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester prepolymer useful for coating and a method of preparing the same
Assignee: Mitsubishi Chemical Corp
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Filing: 1971-03-08
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Granted: 1974-05-21
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Expires: 1991-03-08
Abstract
Abstract A POLYESTER PREPOLYMER WHICH IS CROSS-LINKEDLY HARDENED BY RADIATION OF RADIOACTIVE ENERGY COMPRISES A BACKBONE CHAIN FORMED FROM A NON-CRYSTALLINE POLYESTER OF A MOLECULAR WEIGHT OF 300 TO 500 HAVING A HYDROXYL VALUE OF 20 TO 200 MG. KOH/G., AND A PENDENT SIDE CHAIN ATTACHED TO THE BACKBONE CHAIN IN A PROPORTION OF NOT LOWER THAN 0.5 BUT NOT EXCEEDING 7.0 OF THE SIDE CHAIN WITH RESPECT TO 1,000 MOLECULAR WEIGHT OF THE BACKBONE CHAIN AND CONTAINING AT LEAST TWO ESTER GROUPS AND AT LEAST ONE A,B-OLEFINICALLY UNSATURATED GROUP.
Inventors
- 👤 T Kimura
- 👤 J Kobayashi
- 👤 H Nakamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:49
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/52; C08G63/56; C08G63/58; C08F; C08F283/00; C08F283/01; Y; Y10; Y10S; Y10S525/00; Y10S525/904
Claims Analysis
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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) | 1977-05-20 | 1977-11-19 | 1978-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-20 | 1981-11-19 | 1982-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-20 | 1985-11-19 | 1986-05-21 | $7700.00 | Window Closed / Lapsed |