Patent US2875232A successfully refreshed from Google Patents.
US2875232A
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Phosphonoalkanamides prepared from phosphites and lactams
Assignee: Eastman Kodak Co
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Filing: 1956-02-14
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Granted: 1959-02-24
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Expires: 1976-02-14
Abstract
No abstract record available.
Inventors
- 👤 Richard L Mcconnell
- 👤 Jr Harry W Coover
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:28
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/40; C07F9/4003; C07F9/4006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
A PROCESS FOR PRODUCING A PHOSPHONOALKANAMIDE WHICH COMPRISES REACTING A PHOSPHITE HAVING THE STRUCTURAL FORMULA:
Claim 2
Dependent Claim
15 words
A PROCESS FOR PRODUCING A PHOSPHONOALKANAMIDE WHICH COMPRISES REACTING A PHOSPHITE HAVING THE STRUCTURAL FORMULA:
References Cited (Backward Citations)
US2754320A
Cited
US2668800A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-23 | 1962-08-25 | 1963-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-23 | 1966-08-25 | 1967-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-23 | 1970-08-25 | 1971-02-24 | $7700.00 | Window Closed / Lapsed |