US2948708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-soluble copolymers of ring substituted n-vinyl-2-oxazolidinone
Assignee: Dow Chemical Co
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Filing: 1958-04-03
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Granted: 1960-08-09
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Expires: 1978-04-03
Abstract
No abstract record available.
Inventors
- 👤 Wilhelm E Walles
- 👤 William F Tousignant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:55
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/42; C08F220/44; C08F226/00; C08F226/06; C08F226/10; C08F26/00; C08F26/06; C08F8/00; C08F8/30; C08L; C08L39/00; C08L39/04; C08L39/06; Y; Y10; Y10S; Y10S424/00; Y10S424/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A NORMALLY SOLID COPOLYMER CONSISTING ESSENTIALLY OF BETWEEN ABOUT 1 AND 99 WEIGHT PERCENT, BASED ON THE WEIGHT OF THE COPOLYMER, OF COPOLYMERIZED N-VINYL-5ETHYL-2-OXAZOLIDINONE WITH FROM ABOUT 99 AND 1 WEIGHT. PERCENT, BASED ON THE WEIGHT OF THE COPOLYMER, OF A COPOLYMERIZED MONOMER SELECTED FROM THE GROUP CONSISTING OF N-VINYL-2-PYRROLIDONE, N-VINYL-2-PIPERIDONE, N-VINYL-2-CAPROLACTAM, N-VINYL-SUCCINIMIDE, N-VINYL-3MORPHOLINONE, AND THEIR MIXTURES.
Claim 2
Dependent Claim
57 words
A NORMALLY SOLID COPOLYMER CONSISTING ESSENTIALLY OF BETWEEN ABOUT 1 AND 99 WEIGHT PERCENT, BASED ON THE WEIGHT OF THE COPOLYMER, OF COPOLYMERIZED N-VINYL-5ETHYL-2-OXAZOLIDINONE WITH FROM ABOUT 99 AND 1 WEIGHT. PERCENT, BASED ON THE WEIGHT OF THE COPOLYMER, OF A COPOLYMERIZED MONOMER SELECTED FROM THE GROUP CONSISTING OF N-VINYL-2-PYRROLIDONE, N-VINYL-2-PIPERIDONE, N-VINYL-2-CAPROLACTAM, N-VINYL-SUCCINIMIDE, N-VINYL-3MORPHOLINONE, AND THEIR MIXTURES.
References Cited (Backward Citations)
US2818399A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-09 | 1964-02-08 | 1964-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-09 | 1968-02-08 | 1968-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-09 | 1972-02-08 | 1972-08-09 | $7700.00 | Window Closed / Lapsed |