US3299008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing flexible resinified products from polyepoxides and resulting products
Assignee: Shell USA Inc
•
Filing: 1958-12-23
•
Granted: 1967-01-17
•
Expires: 1978-12-23
Abstract
No abstract record available.
Inventors
- 👤 Albert C Mueller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:35
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/42; C08G59/4246; C08G59/4269; C08L; C08L63/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
A PROCESS FOR PREPARING FLEXIBLE INSOLUBLE INFUSIBLE PRODUCTS FROM POLYEPOXIDES WHICH CONSISTS OF HEATING AND REACTING (1) A POLYEPOXIDE HAVING MORE THAN ONE VIC-EPOXY GROUP WITH (2) FROM .9 TO 1.1 CHEMICAL EQUIVALENT AMOUNTS OF A PARTIAL ESTER OF AN ACID ANHYDRIDE OF THE FORMULA
Claim 2
Dependent Claim
45 words
A PROCESS FOR PREPARING FLEXIBLE INSOLUBLE INFUSIBLE PRODUCTS FROM POLYEPOXIDES WHICH CONSISTS OF HEATING AND REACTING (1) A POLYEPOXIDE HAVING MORE THAN ONE VIC-EPOXY GROUP WITH (2) FROM .9 TO 1.1 CHEMICAL EQUIVALENT AMOUNTS OF A PARTIAL ESTER OF AN ACID ANHYDRIDE OF THE FORMULA
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US2783138A
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US2857258A
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US2640037A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-16 | 1970-07-18 | 1971-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-16 | 1974-07-18 | 1975-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-16 | 1978-07-18 | 1979-01-17 | $7700.00 | Window Closed / Lapsed |