US2652416A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reaction of lactones with trialkyl phosphite
Assignee: Eastman Kodak Co
•
Filing: 1952-01-02
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Granted: 1953-09-15
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Expires: 1972-01-02
Abstract
No abstract record available.
Inventors
- 👤 Jr Harry W Coover
- 👤 Joseph B Dickey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:32
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/40; C07F9/4003; C07F9/4015; C07F9/4006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
21 words
A PROCESS FOR PREPARING DIALKYL CARBOALKOXY ALKANE PHOSPHONATES COMPRISING HEATING TOGETHER A TRIALKYL PHOSPHITE AND A LACTONE AT ABOUT 100-250* C.
Claim 2
Dependent Claim
21 words
A PROCESS FOR PREPARING DIALKYL CARBOALKOXY ALKANE PHOSPHONATES COMPRISING HEATING TOGETHER A TRIALKYL PHOSPHITE AND A LACTONE AT ABOUT 100-250* C.
References Cited (Backward Citations)
US2449987A
Cited
US2593213A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-14 | 1957-03-16 | 1957-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-14 | 1961-03-16 | 1961-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-14 | 1965-03-16 | 1965-09-15 | $7700.00 | Window Closed / Lapsed |