US2865960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the removal of impurities from water-soluble acrylamides
Assignee: Eastman Kodak Co
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Filing: 1956-02-28
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Granted: 1958-12-23
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Expires: 1976-02-28
Abstract
No abstract record available.
Inventors
- 👤 Jr Newton H Shearer
- 👤 Jr Harry W Coover
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:20
CPC Classifications
C; C07; C07C; C07C233/00; C07C233/01; C07C233/02; C07C233/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
A PROCESS OF PURIFYING AN AQUEOUS SOLUTION OF A COMPOSITION HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
14 words
A PROCESS OF PURIFYING AN AQUEOUS SOLUTION OF A COMPOSITION HAVING THE GENERAL FORMULA:
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) | 1961-12-22 | 1962-06-23 | 1962-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-22 | 1966-06-23 | 1966-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-22 | 1970-06-23 | 1970-12-23 | $7700.00 | Window Closed / Lapsed |