Patent US3153036A successfully refreshed from Google Patents.
US3153036A
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US
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Phosphorous acid esters derived from transesterification of phosphite triesters with mono-, di-, and trisaccharides
Assignee: Bayer AG
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Filing: 1962-08-28
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Granted: 1964-10-13
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Expires: 1982-08-28
Abstract
No abstract record available.
Inventors
- 👤 Merten Rudolf
- 👤 Holtschmidt Hans
- 👤 Oertel Gunter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:48
CPC Classifications
C; C07; C07H; C07H11/00; C07H11/04; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/141
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
PHOSPHOROUS ACID ESTERS CONTAINING AT LEAST TWO PHOSPHITE GROUPS PER MOLECULE AND CONTAINING FREE HYDROXYL GROUPS PREPARED BY A PROCESS WHICH COMPRISES REACTING AT LEAST ABOUT 0.5 PERCENT BY WEIGHT OF A PHOSPHITE HAVING THE FORMULA P(OR)3 WHEREIN R IS SELECTED FROM THE GROUP CONSISTING OF ALKYL HAVING 1 TO 6 CARBON ATOMS, HALOKYL HAVING 1 TO 6 CARBON ATOMS, CYCLOALKYL HAVING 1 TO 6 CARBON ATOMS, BENZYL AND HALOBENZYL, HALO IN EACH INSTANCE BEING SELECTED FROM THE GROUP CONSISTING OF CHLORINE AND BROMINE, WITH A MEMBER SELECTED FROM THE GROUP CONSISTING OF MONO-, DI- AND TRISACCHARIDES HAVING FROM 4 TO 18 CARBON ATOMS AT A TEMPERATURE OF FROM ABOUT 50*C. TO 180*C. WITH THE EXCLUSION OF WATER UNTIL A PHOSPHITE POLYOL IS OBTAINED HAVING AN HYDROXYL NUMBER OF FROM ABOUT 30 TO ABOUT 800.
Claim 2
Dependent Claim
135 words
PHOSPHOROUS ACID ESTERS CONTAINING AT LEAST TWO PHOSPHITE GROUPS PER MOLECULE AND CONTAINING FREE HYDROXYL GROUPS PREPARED BY A PROCESS WHICH COMPRISES REACTING AT LEAST ABOUT 0.5 PERCENT BY WEIGHT OF A PHOSPHITE HAVING THE FORMULA P(OR)3 WHEREIN R IS SELECTED FROM THE GROUP CONSISTING OF ALKYL HAVING 1 TO 6 CARBON ATOMS, HALOKYL HAVING 1 TO 6 CARBON ATOMS, CYCLOALKYL HAVING 1 TO 6 CARBON ATOMS, BENZYL AND HALOBENZYL, HALO IN EACH INSTANCE BEING SELECTED FROM THE GROUP CONSISTING OF CHLORINE AND BROMINE, WITH A MEMBER SELECTED FROM THE GROUP CONSISTING OF MONO-, DI- AND TRISACCHARIDES HAVING FROM 4 TO 18 CARBON ATOMS AT A TEMPERATURE OF FROM ABOUT 50*C. TO 180*C. WITH THE EXCLUSION OF WATER UNTIL A PHOSPHITE POLYOL IS OBTAINED HAVING AN HYDROXYL NUMBER OF FROM ABOUT 30 TO ABOUT 800.
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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) | 1967-10-13 | 1968-04-13 | 1968-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-13 | 1972-04-13 | 1972-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-13 | 1976-04-13 | 1976-10-13 | $7700.00 | Window Closed / Lapsed |