US3732316A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing methyl phosphine oxides
Assignee: Hooker Chemical Corp
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Filing: 1970-11-12
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Granted: 1973-05-08
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Expires: 1990-11-12
Abstract
Abstract METHYL PHOSPHINE OXIDES ARE PREPARED BY THERMAL ISOMERIZATION OF THE CORRESPONDING HYDROXYMETHYL PHOSPHINES. THE PRODUCTS FIND UTILITY AS FIRE RETARDANT ADDITIVES FOR ORGANIC POLYMERS SUCH AS POLYURETHANE FOAMS AND POLYESTERS, AND AS INTERMEDIATES FOR THE PRODUCTION OF SURFACTANTS, PLASTICIZERS, FIRE RETARDANT POLYMERS, AND GENERALLY OF OXIDATION STABILIZERS FORUSE IN LUBRICATIONG OILS, HYDRAULIC FLUIDS AND ORGANIC POLYMERS.
Inventors
- 👤 K Lin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:12
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/53; C08K5/5397; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/50; C07F9/53; C07F9/547; C07F9/6564; C07F9/6568; C07F9/65685; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3878; C08G18/388; C10; C10M; C10M2207/00; C10M2207/28; C10M2207/282; C10M2207/34; C10N; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 0
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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) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |