US3576793A
Expired / Lapsed
US
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Polymers of alkylene diphosphonic acids and salts and copolymers thereof
Assignee: Monsanto Co
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Filing: 1969-09-11
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Granted: 1971-04-27
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Expires: 1989-09-11
Abstract
Abstract POLYMERS OF LOWER ALKYLENE-1,1-DIPHOSPHONATES, COPOLYMERS OF LOWER ALKYLENE-1,1-DIPHOSPHONATED AND POLYMERIZABLE ETHYLENICALLY UNSATURATED COMPOUNDS, AS WELL AS SYNTHETIC POLYMERS CONTAINING LOWER ALKYLENE-1,1-DIPHOSPHONATES, ARE DESCRIBED WHICH EXHIBIT MAY AND VARIOUS ADVANTAGEOUS FEATURES INCLUDING INCREASED RESITANCE TO BURNING.
Inventors
- 👤 Robert L Carroll
- 👤 Marvin M Crutchfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:08
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/53; C08K5/5317; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/3804; C07F9/3839; C07F9/3843; C07F9/3847; C08F; C08F30/00; C08F30/02
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |