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Patent US2550651A successfully refreshed from Google Patents.
US2550651A
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Cyclohexene phosphonates and their preparation
Assignee: Eastman Kodak Co
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Filing: 1949-07-09
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Granted: 1951-04-24
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Expires: 1969-07-09
Abstract
No abstract record available.
Inventors
- 👤 Joseph B Dickey
- 👤 Jr Harry W Coover
- 👤 Jr Newton H Shearer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:34
CPC Classifications
A; A01; A01N; A01N57/00; A01N57/18; A01N57/20; C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/40; C07F9/4003; C07F9/4018
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
A METHOD FOR PREPARING CYCLOHEXENE PHOSPHONATES WHICH COMPRISES HEATING TOGETHER AT 100-250* C. FOR 1-10 HOURS A COMPOUND HAVING THE FORMULA CZ2=CZ-CZ=CZ2, Z BEING SELECTED FROM HYDROGEN AND ALKYL WITH A COMPOUND HAVING THE FORMULA
Claim 2
Independent Claim
35 words
A METHOD FOR PREPARING CYCLOHEXENE PHOSPHONATES WHICH COMPRISES HEATING TOGETHER AT 100-250* C. FOR 1-10 HOURS A COMPOUND HAVING THE FORMULA CZ2=CZ-CZ=CZ2, Z BEING SELECTED FROM HYDROGEN AND ALKYL WITH A COMPOUND HAVING THE FORMULA
References Cited (Backward Citations)
US2439214A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-23 | 1954-10-23 | 1955-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-23 | 1958-10-23 | 1959-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-23 | 1962-10-23 | 1963-04-24 | $7700.00 | Window Closed / Lapsed |