US2607761A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reaction products of alkylene oxides and synthetic polymeric carboxylic acids
Assignee: IND RES INST OF UNIVERSITY
•
Filing: 1948-04-10
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Granted: 1952-08-19
•
Expires: 1968-04-10
Abstract
No abstract record available.
Inventors
- 👤 Raymond B Seymour
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:33
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/14; C08F2810/00; C08F2810/30
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
48 words
THE PROCESS WHICH COMPRISES REACTING A MOLECULAR EXCESS OF AN EPOXY COMPOUND SELECTED FROM THE CLASS CONSISTING OF ETHYLENE OXIDE, PROPYLENE OXIDE, EPOXYBUTANE, EPOXYBUTENE, EPICHLOROHYDRIN, AND PHENYLETHYLENE OXIDE WITH AN AQUEOUS ALKALINE SOLUTION OF A SYNTHETIC COPOLYMER CONSISTING ESSENTIALLY OF MALEIC ANHYDRIDE AND A VINYL COMPOUND COPOLYMERIZABLE THEREWITH.
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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) | 1955-08-19 | 1956-02-18 | 1956-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-19 | 1960-02-18 | 1960-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-19 | 1964-02-18 | 1964-08-19 | $7700.00 | Window Closed / Lapsed |