US2961431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymer of sodium ethylenesulfonate and nu-vinylpyrrolidone
Assignee: Hercules Powder Co
•
Filing: 1958-12-04
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Granted: 1960-11-22
•
Expires: 1978-12-04
Abstract
No abstract record available.
Inventors
- 👤 Kutner Abraham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:23
CPC Classifications
C; C08; C08F; C08F28/00; Y; Y10; Y10S; Y10S424/00; Y10S424/02; Y10S516/00; Y10S516/01; Y10S516/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
AS A NEW COMPOSITION OF MATTER A COPOLYMER OF SODIUM ETHYLENESULFONATE AND N-VINYLPYRROLIDONE.
Claim 2
Dependent Claim
13 words
AS A NEW COMPOSITION OF MATTER A COPOLYMER OF SODIUM ETHYLENESULFONATE AND N-VINYLPYRROLIDONE.
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) | 1963-11-22 | 1964-05-23 | 1964-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-22 | 1968-05-23 | 1968-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-22 | 1972-05-23 | 1972-11-22 | $7700.00 | Window Closed / Lapsed |