US2494295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compositions of resinous epoxides and aromatic sulfonamide-aldehyde condensates
Assignee: Celanese Coatings Co
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Filing: 1946-09-13
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Granted: 1950-01-10
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Expires: 1966-09-13
Abstract
No abstract record available.
Inventors
- 👤 Greenlee Sylvan Owen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:53
CPC Classifications
C; C08; C08L; C08L61/00; C08L61/20; C08L61/22; C08L63/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
NEW COMPOSITIONS CONTAINING IN SUBSTANTIAL PROPORTIONS ALDEHYE-ARYL AWULFONAMIDE RESINS CONTAINING ACTIVE HYDROGEN AND COMPLEX RESINOUS EPOXIDES WHICH ARE POLYETHER DERIVATIVES OF POLYHYDRIC PHENOLS CONTAINING AN AVERAGE OF MORE THAN ONE EPOXIDE GROUP PER MOLECULE AND FREE FROM FUNCTIONAL GROUPS OTHER THAN EPOXIDE AND HYDROXYL GROUPS.
Claim 2
Dependent Claim
45 words
NEW COMPOSITIONS CONTAINING IN SUBSTANTIAL PROPORTIONS ALDEHYE-ARYL AWULFONAMIDE RESINS CONTAINING ACTIVE HYDROGEN AND COMPLEX RESINOUS EPOXIDES WHICH ARE POLYETHER DERIVATIVES OF POLYHYDRIC PHENOLS CONTAINING AN AVERAGE OF MORE THAN ONE EPOXIDE GROUP PER MOLECULE AND FREE FROM FUNCTIONAL GROUPS OTHER THAN EPOXIDE AND HYDROXYL GROUPS.
References Cited (Backward Citations)
GB447417A
Cited
US2076624A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-09 | 1953-07-11 | 1954-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-09 | 1957-07-11 | 1958-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-09 | 1961-07-11 | 1962-01-10 | $7700.00 | Window Closed / Lapsed |