Patent US2668802A successfully refreshed from Google Patents.
US2668802A
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Polymeric vinyl phenol-aldehyde resins
Assignee: British Resin Products Ltd
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Filing: 1949-11-16
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Granted: 1954-02-09
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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
2026-10-29 08:17
CPC Classifications
C; C08; C08G; C08G8/00; C08G8/04; C08F; C08F8/00; C08F8/28; C08F8/30; C08F8/32; C08G14/00; C08G14/14; C08G8/38; C08K; C08K5/00; C08K5/04; C08K5/07; C08F2810/00; C08F2810/20
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
78 words
A PROCESS FOR THE PRODUCTION OF A RESIN WHICH COMPRISES, CONDENSING A POLYMERIC MATERIAL WITH AN ALDEHYDE SELECTED FROM THE GROUP CONSISTING OF FORMALDEHYDE AND COMPOUNDS FORMING FORMALDEHYDE UNDER THE REACTION CONDITIONS, ACETALDEHYDE, BUTYRALDEHYDE AND FURFURALDEHYDE, SAID 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.
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) | 1957-02-08 | 1957-08-10 | 1958-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-08 | 1961-08-10 | 1962-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-08 | 1965-08-10 | 1966-02-09 | $7700.00 | Window Closed / Lapsed |