US3160666A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vinylphosphorus compounds and method of preparation
Assignee: Primerica Inc
•
Filing: 1957-07-12
•
Granted: 1964-12-08
•
Expires: 1977-07-12
Abstract
No abstract record available.
Inventors
- 👤 Hugh E Ramsden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:05
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/30; C07F9/38; C07F9/50; C07F9/5013
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
7 words
TRIVALENT PHOSPHORUS COMPOUNDS OF THE GENERAL FORMULA
References Cited (Backward Citations)
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Cited
US2803597A
Cited
US2957931A
Cited
US2642461A
Cited
US2912465A
Cited
US2916518A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-12-08 | 1968-06-08 | 1968-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-08 | 1972-06-08 | 1972-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-08 | 1976-06-08 | 1976-12-08 | $7700.00 | Window Closed / Lapsed |