US2647882A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Etherification of vinyl phenol polymers and copolymers
Assignee: British Resin Products Ltd
•
Filing: 1949-11-16
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Granted: 1953-08-04
•
Expires: 1969-11-16
Abstract
No abstract record available.
Inventors
- 👤 Evans Edward Michael
- 👤 Whitney John Edward Seager
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:04
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
17 words
A PROCESS AS CLAIMED IN CLAIM 7, WHEREIN THE POLYMERIC MATERIAL IS ALSO REACTED WITH AN ALDEHYDE.
Claim 2
Dependent Claim
72 words
A PROCESS FOR THE PRODUCTION OF A RESIN WHICH COMPRISES, TREATING A POLYMERIC MATERIAL HAVING IN ITS MOLECULAR STRUCTURE POLYMER UNITS SELECTED FROM THE GROUP CONSISTING OF ORTHO, META AND PARA VINYL PHENOL POLYMER UNITS AND THEIR LOWER NUCLEAR HOMOLOGUE POLYMERS HAVING AT LEAST ONE UNSUBSTITUTED REACTIVE NUCLEAR HYDROGEN ATOM IN THE NUCLEUS, WITH AN ETHERIFYING AGENT SELECTED FROM THE GROUP CONSISTING OF ALKYL, ALKENYL AND ARALKYL SULPHATES, CHLORIDES, BROMIDES AND IODIDES.
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) | 1956-08-03 | 1957-02-02 | 1957-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-03 | 1961-02-02 | 1961-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-03 | 1965-02-02 | 1965-08-04 | $7700.00 | Window Closed / Lapsed |