US2583638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vinyl phenol copolymers
Assignee: British Resin Products Ltd
•
Filing: 1950-02-07
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Granted: 1952-01-29
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Expires: 1970-02-07
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
2026-10-27 23:18
CPC Classifications
C; C08; C08F; C08F240/00; C08F16/00; C08F16/02; C08F212/00; C08F212/02; C08F212/04; C08F212/14; C08F212/22; C08F212/24; C08F236/00; C08F236/02; C08F236/04; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
53 words
A COPOLYMER OF A VINYL PHENOL COMPOUND SELECTED FROM THE GROUP CONSISTING OF ORTHO, META AND PARA VINYL PHENOL AND THEIR LOWER NUCLEAR HOMOLOGUES HAVING AT LEAST ONE UNSUBSTITUTED REACTIVE HYDROGEN ATOM ATTACHED TO THE NUCLEUS, WITH A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF CYCLOPENTADIENE, INDENE, COUMARONE AND THEIR POLYMERISABLE LOWER HOMOLOGUES.
References Cited (Backward Citations)
US1754052A
Cited
US2499365A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-28 | 1955-07-30 | 1956-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-28 | 1959-07-30 | 1960-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-28 | 1963-07-30 | 1964-01-29 | $7700.00 | Window Closed / Lapsed |