Patent US3157694A successfully refreshed from Google Patents.
US3157694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making bisphosphinic acid compounds
Assignee: Monsanto Co
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Filing: 1960-11-07
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Granted: 1964-11-17
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Expires: 1980-11-07
Abstract
No abstract record available.
Inventors
- 👤 Harwood Harold James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:51
CPC Classifications
C; C08; C08G; C08G79/00; C08G79/02; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/30; C07F9/305
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
THE METHOD WHICH COMPRISES REACTING A CYCLID PHOSPHONITE ESTR OF THE FORMULA
Claim 2
Independent Claim
12 words
THE METHOD WHICH COMPRISES REACTING A CYCLID PHOSPHONITE ESTR OF THE FORMULA
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-17 | 1968-05-18 | 1968-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-17 | 1972-05-18 | 1972-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-17 | 1976-05-18 | 1976-11-17 | $7700.00 | Window Closed / Lapsed |