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Patent US2667473A successfully refreshed from Google Patents.
US2667473A
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Vinyl acetate-n-vinyl-pyrrolidone copolymers
Assignee: Monsanto Chemicals Ltd
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Filing: 1952-02-08
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Granted: 1954-01-26
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Expires: 1972-02-08
Abstract
No abstract record available.
Inventors
- 👤 Richard R Morner
- 👤 Jr Raymond I Longley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:19
CPC Classifications
C; C08; C08F; C08F218/00; C08F218/02; C08F218/04; C08F218/08; Y; Y10; Y10S; Y10S424/00; Y10S424/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
21 words
THE COPOLYMER OF VINYL ACETATE AND FROM 10 PER CENT TO 40 PER CENT BY WEIGHT OF SAID COPOLYMER OF N-VIYL-2-PYRROLIDONE.
Claim 2
Dependent Claim
21 words
THE COPOLYMER OF VINYL ACETATE AND FROM 10 PER CENT TO 40 PER CENT BY WEIGHT OF SAID COPOLYMER OF N-VIYL-2-PYRROLIDONE.
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) | 1957-01-25 | 1957-07-27 | 1958-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-25 | 1961-07-27 | 1962-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-25 | 1965-07-27 | 1966-01-26 | $7700.00 | Window Closed / Lapsed |