US3256370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing alkylene-diphosphonates
Assignee: Monsanto Co
•
Filing: 1962-12-13
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Granted: 1966-06-14
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Expires: 1982-12-13
Abstract
No abstract record available.
Inventors
- 👤 Steven J Fitch
- 👤 Shih K Liu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:12
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/40; C07F9/4003; C07F9/4025; C07F9/4028
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
THE PROCESS FOR PREPARING ALKYLENEDIPHOSPHONATES COMPRISING REACTING A TRI-ORGANO PHOSPHITE HAVING THE FORMULA
Claim 2
Dependent Claim
13 words
THE PROCESS FOR PREPARING ALKYLENEDIPHOSPHONATES COMPRISING REACTING A TRI-ORGANO PHOSPHITE HAVING THE 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) | 1969-06-13 | 1969-12-13 | 1970-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-13 | 1973-12-13 | 1974-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-13 | 1977-12-13 | 1978-06-14 | $7700.00 | Window Closed / Lapsed |