Patent US3901444A successfully refreshed from Google Patents.
US3573256A
Expired / Lapsed
US
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Epoxide substituted polythiourea polyamino compound and composition thereof with 1,2-polymeric epoxide
Assignee: KH Neochem Co Ltd
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Filing: 1969-07-23
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Granted: 1971-03-30
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Expires: 1989-07-23
Abstract
Abstract AN EPOXIDE RESIN IS FORMED BY REACTING A 1,2-POLYMERIC ORGANIC EPOXIDE WITH THE REACTION PRODUCT OF ETHYLENE OXIDE AND POLYTHIOUREA AMINE, SAID POLYTHIOUREA AMINE HAVING BEEN FORMED BY REACTING MONOMERIC POLYAMINE WITH THIOUREA. THE AFORESAID 1,2 EPOXIDE RESIN POSSESS SOLVENT RESISTANT AND TENACIOUS PROPERTIES, AND IS UTILIZABLE IN ADHESIVES, COATING MATERIALS, SOLVENTS, ETC.
Inventors
- 👤 Shiro Kudo
- 👤 Shinichi Tsurugi
- 👤 Jun Hayasaki
- 👤 Koichi Nagaoka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:14
CPC Classifications
C; C08; C08L; C08L75/00; C08L75/02; C08L63/00; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/07
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) | 1974-03-29 | 1974-09-28 | 1975-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-29 | 1978-09-28 | 1979-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-29 | 1982-09-28 | 1983-03-30 | $7700.00 | Window Closed / Lapsed |