US3705191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substituted ethane diphosphonic acids and salts and esters thereof
Assignee: Monsanto Co
•
Filing: 1970-04-13
•
Granted: 1972-12-05
•
Expires: 1990-04-13
Abstract
Abstract SUBSTITUTED ETHANE DIPHOSPHOCIC ACIDS AND SALTS AND ESTERS THEREOF AS EXEMPLIFIED BY THE ESTER COMPOUND HAVING THE FORMULA HO-CH2-C(-OH)(-P(=O)(-O-C2H5)2)2 TETRAETHYL, 1,2 DIHYDROXY ETHANE-1,1-DIPHOSPHONATE AND PROCESSES FOR PREPARING THE SAME WHICH GENERICALLY COMPRISE THE "DE-OXIRANIZATION" OF AN EPOXY ETHANE DIPHOSPHONATE HAVING THE FORMULA 2,2-DI(O=P(-O-R3)2-)OXIRANE WHEREIN R3 IS HYDROGEN, A METAL ION, OR AN ORGANIC RADICAL. THESE COMPOUNDS ARE USEFUL AS SEQUESTERING AGENTS AND IN RETARDING CELLULOSE MATERIALS FROM FLAMING.
Inventors
- 👤 Al F Kerst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:42
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/3804; C07F9/3839; C07F9/547; C07F9/655; C07F9/65502; C07F9/65505; D; D06; D06M; D06M13/00; D06M13/244; D06M13/282; D06M13/288
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1975-12-05 | 1976-06-05 | 1976-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-05 | 1980-06-05 | 1980-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-05 | 1984-06-05 | 1984-12-05 | $7700.00 | Window Closed / Lapsed |