Patent US2946773A successfully refreshed from Google Patents.
US2946773A
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Water-soluble copolymers of ring-substituted n-vinyl-2-oxazolidinone
Assignee: Dow Chemical Co
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Filing: 1958-05-07
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Granted: 1960-07-26
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Expires: 1978-05-07
Abstract
No abstract record available.
Inventors
- 👤 Wilhelm E Walles
- 👤 William F Tousignant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:29
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/42; C08F220/44; C08F26/00; C08F26/06; C08F8/00; C08F8/30; Y; Y10; Y10S; Y10S424/00; Y10S424/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 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 BETWEEN ABOUT 99 AND 1 WEIGHT PERCENT, BASED ON THE WEIGHT OF THE COPOLYMER, OF COPOLYMERIZED N-INVYL-5-METHYL-2-OXAZOLIDINONE.
Claim 2
Dependent Claim
42 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 BETWEEN ABOUT 99 AND 1 WEIGHT PERCENT, BASED ON THE WEIGHT OF THE COPOLYMER, OF COPOLYMERIZED N-INVYL-5-METHYL-2-OXAZOLIDINONE.
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) | 1963-07-26 | 1964-01-25 | 1964-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-26 | 1968-01-25 | 1968-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-26 | 1972-01-25 | 1972-07-26 | $7700.00 | Window Closed / Lapsed |