US3732309A
Expired / Lapsed
US
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Polyepoxide-polymercaptan-amine adducts
Assignee: Novartis AG
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Filing: 1969-12-30
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Granted: 1973-05-08
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Expires: 1989-12-30
Abstract
Abstract AS CURING AGENTS FOR EPOXY RESINS ADDUCTS OBTAINED BY REACTION OF (A) A POLYEPOXIDE HAVING, PER AVERAGE MOLECULE, MORE THAN ONE 1,2-EPOXIDE GROUP OF THE FORMULA DIRECTLY ATTACHED TO OXYGEN, TO NITROGEN, OR TO SULPHUR, WHERE R AND R1 EACH REPRESENT HYDROGEN OR TOGETHER REPRESENT -CH2CH2-, (B) A POLYMERCAPTAN CONTAINING AT LEAST ONE PAIR OF-SH GROUPS IN WHICH ONE-SH GROUP IS SEPARATED FROM THE OTHER BY A CHAIN OF AT LEAST SIX CARBON, OR CARBON AND OXYGEN, ATOMS, AND (C) AN AMINE. -CH(-R)-CH<(-O-CH(-R1)-)
Inventors
- 👤 E Garnish
- 👤 S Walden
- 👤 C Haskins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:35
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/66; C08G59/182; C08G59/50; C08G59/56
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) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |