Patent US3153577A successfully refreshed from Google Patents.
US3296202A
Expired / Lapsed
US
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Process for curing polyepoxides
Assignee: Bayer AG
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Filing: 1963-04-16
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Granted: 1967-01-03
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Expires: 1983-04-16
Abstract
No abstract record available.
Inventors
- 👤 Schmitz-Josten Robert
- 👤 Kubens Rolf
- 👤 Frank Gunter
- 👤 Wegler Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:01
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/42; C08G59/4215
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A PROCESS FOR PRODUCING A CURED PRODUCT WHICH COMPRISES HEATING TO A TEMPERATURE BETWEEN 50*C. AND 280*C. A MIXTURE OF A 1,2-POLYEPOXIDE HAVING A POLYEPOXIDE EQUIVALENCY BETWEEN 0.1 TO 2.0 AND AT LEAST ONE CURING AGENT SELECTED FROM THE GROUP CONSISTING OF 3METHYL-HEXAHYDROPTHALIC ANHYDRIDE AND 4-METHYL-HEXAHYDROPHTHALIC ANHYDRIDE, SAID MIXTURE CONTAINING 0.6 TO 1.2 MOLS OF SAID CURING AGENT PER MOL OF EPOXY GROUP PRESENT IN SAID POLYEPOXIDE.
Claim 2
Dependent Claim
67 words
A PROCESS FOR PRODUCING A CURED PRODUCT WHICH COMPRISES HEATING TO A TEMPERATURE BETWEEN 50*C. AND 280*C. A MIXTURE OF A 1,2-POLYEPOXIDE HAVING A POLYEPOXIDE EQUIVALENCY BETWEEN 0.1 TO 2.0 AND AT LEAST ONE CURING AGENT SELECTED FROM THE GROUP CONSISTING OF 3METHYL-HEXAHYDROPTHALIC ANHYDRIDE AND 4-METHYL-HEXAHYDROPHTHALIC ANHYDRIDE, SAID MIXTURE CONTAINING 0.6 TO 1.2 MOLS OF SAID CURING AGENT PER MOL OF EPOXY GROUP PRESENT IN SAID POLYEPOXIDE.
References Cited (Backward Citations)
US2768153A
Cited
US2935488A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-02 | 1970-07-04 | 1971-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-02 | 1974-07-04 | 1975-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-02 | 1978-07-04 | 1979-01-03 | $7700.00 | Window Closed / Lapsed |