US2721876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dialkyl 2-cyanopropene-3-phosphonates
Assignee: Eastman Kodak Co
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Filing: 1950-10-13
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Granted: 1955-10-25
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Expires: 1970-10-13
Abstract
No abstract record available.
Inventors
- 👤 Joseph B Dickey
- 👤 Jr Harry W Coover
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:04
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/40; C07F9/4003; C07F9/4015; C08; C08F; C08F30/00; C08F30/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
A CYANOPROPENE PHOSPHONATE HAVING THE FOLLOWING GENERAL FORMULA:
Claim 2
Dependent Claim
8 words
A CYANOPROPENE PHOSPHONATE HAVING THE FOLLOWING 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) | 1958-10-24 | 1959-04-25 | 1959-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-24 | 1963-04-25 | 1963-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-24 | 1967-04-25 | 1967-10-25 | $7700.00 | Window Closed / Lapsed |