Patent US3351574A successfully refreshed from Google Patents.
US3351574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Castor oil polyglycidyl ether
Assignee: Celanese Coatings Co
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Filing: 1965-02-24
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Granted: 1967-11-07
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Expires: 1985-02-24
Abstract
No abstract record available.
Inventors
- 👤 Darrel D Hicks
- 👤 William J Belanger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:35
CPC Classifications
C; C07; C07D; C07D303/00; C07D303/02; C07D303/12; C07D303/18; C07D303/20; C07D303/24; C08; C08G; C08G59/00; C08G59/18; C08G59/20; C08G59/32; C08G59/3218; C08G59/38
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
26 words
A CURABLE COMPOSITION COMPRISING CASTOR OIL POLYGLYCIDYL ETHER, A DIFFERENT POLYEPOXIDE CONTAINING MORE THAN ONE 1,2 EPOXY GROUP PER MOLECULE AND AN EPOXY RESIN CURING AGENT.
Claim 2
Dependent Claim
27 words
THE COMPOSITION OF CLAIM 6 WHEREIN THE POLYEPOXIDE IS A DIGLYCIDYL ETHER OF A DIHYDRIC PHENOL AND THE EPOXY RESIN CURING AGENT IS A POLYCARBOXYLIC ACID ANHYDRIDE.
Claim 3
Dependent Claim
6 words
THE CURED COMPOSITION OF CLAIM 7.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-06 | 1971-05-08 | 1971-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-06 | 1975-05-08 | 1975-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-06 | 1979-05-08 | 1979-11-07 | $7700.00 | Window Closed / Lapsed |