Patent US2976118A successfully refreshed from Google Patents.
US2976118A
Expired / Lapsed
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Method of preparing hypophosphites
Assignee: La Fonte Electrique SA
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Filing: 1957-08-29
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Granted: 1961-03-21
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Expires: 1977-08-29
Abstract
No abstract record available.
Inventors
- 👤 Pahud Rene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:55
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
A METHOD OF PREPARING A HYPOSPHOSPHITE WHICH CONSISTS OF REACTING, IN ADMIXTURE WITH A CATALYTIC AMOUNT OF A SATURATED ALIPHATIC ALCOHOL, YELLOW ELEMENTAL PHOSPHORUS WITH WATER AND A METAL HYDROXIDE SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL HYDROXIDES AND ALKALINE EARTH METAL HYDROXIDES WHEREBY A HYPOPHOSPHITE IS FORMED.
Claim 2
Independent Claim
49 words
A METHOD OF PREPARING A HYPOSPHOSPHITE WHICH CONSISTS OF REACTING, IN ADMIXTURE WITH A CATALYTIC AMOUNT OF A SATURATED ALIPHATIC ALCOHOL, YELLOW ELEMENTAL PHOSPHORUS WITH WATER AND A METAL HYDROXIDE SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL HYDROXIDES AND ALKALINE EARTH METAL HYDROXIDES WHEREBY A HYPOPHOSPHITE IS FORMED.
References Cited (Backward Citations)
GB441474A
Cited
US2595198A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-20 | 1964-09-19 | 1965-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-20 | 1968-09-19 | 1969-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-20 | 1972-09-19 | 1973-03-21 | $7700.00 | Window Closed / Lapsed |