US2584343A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reacting polysiloxane with glycerine and thereafter with dicarboxylic acid and product
Assignee: Dow Silicones Corp
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Filing: 1950-01-07
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Granted: 1952-02-05
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Expires: 1970-01-07
Abstract
No abstract record available.
Inventors
- 👤 Jr John T Goodwin
- 👤 Melvin J Hunter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:03
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/42; C08G77/445
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
174 words
A METHOD OF PREPARING RESINOUS MATERIALS WHICH COMPRISES REACTING A POLYSILOXNE CONTAINING FROM 0.9 TO 2.1 SILICON-BONDED MONOVALENT HYDROCARBON RADICALS PER SILICON ATOM, SAID RADICALS BEING SELECTED FROM THE GROUP CONSISTING OF SATURATED ALIPHATIC RADICALS OF LESS THAN SEVEN CARBON ATOMS AND MONOVALEN ARYL RADICALS, AND FROM .05 TO 2 SILICON-BONDED SILOXANE FUNCTIONAL GROUPS PER SILICON ATOM, SAID GROUPS BEING SELECTED FROM THE GROUP CONSISTING OF ALKOXY AND ACYLOXY RADICALS, SAID ACYLOXY RADICALS BEING OF THE FORMULA RCOO- WHERE R IS A HYDROCARBON RADICAL, THE REMAINDER OF THE VALENCES OF THE SILICON ATOMS IN SAID SILOXANE BEING SATIFIED BY OXYGEN ATOMS, WITH GLYCERINE IN AMOUNT SUCH THAT THE RATIO OF SILICON-BONEDE SILOXANE FUNCTIONAL GROUPS TO GLYCERINE OH IS FROM 0.1 TO 1 FUNCTIONAL AFTER REACTING THE SILOXNE-GLYCERINE ESTER THUS FORMED WITH AN ACIDIC COMPOUND SELECTED FORM THE GROUP CONSISTING OF DICARBOXYLIC ACIDS AND ANYHDRIDES THEREOF IN AMOUNT SUCH THAT THE RATIO OF DICARBOXYLIC ACID GROUPS TO THE SUM OF THE TOTAL INTRODUCED SILICON-BONDED SILOXANE FUNCTIONAL GROUPS PLUS HYDROXYL GROUPS IS FROM .08 TO .75.
Claim 2
Independent Claim
174 words
A METHOD OF PREPARING RESINOUS MATERIALS WHICH COMPRISES REACTING A POLYSILOXNE CONTAINING FROM 0.9 TO 2.1 SILICON-BONDED MONOVALENT HYDROCARBON RADICALS PER SILICON ATOM, SAID RADICALS BEING SELECTED FROM THE GROUP CONSISTING OF SATURATED ALIPHATIC RADICALS OF LESS THAN SEVEN CARBON ATOMS AND MONOVALEN ARYL RADICALS, AND FROM .05 TO 2 SILICON-BONDED SILOXANE FUNCTIONAL GROUPS PER SILICON ATOM, SAID GROUPS BEING SELECTED FROM THE GROUP CONSISTING OF ALKOXY AND ACYLOXY RADICALS, SAID ACYLOXY RADICALS BEING OF THE FORMULA RCOO- WHERE R IS A HYDROCARBON RADICAL, THE REMAINDER OF THE VALENCES OF THE SILICON ATOMS IN SAID SILOXANE BEING SATIFIED BY OXYGEN ATOMS, WITH GLYCERINE IN AMOUNT SUCH THAT THE RATIO OF SILICON-BONEDE SILOXANE FUNCTIONAL GROUPS TO GLYCERINE OH IS FROM 0.1 TO 1 FUNCTIONAL AFTER REACTING THE SILOXNE-GLYCERINE ESTER THUS FORMED WITH AN ACIDIC COMPOUND SELECTED FORM THE GROUP CONSISTING OF DICARBOXYLIC ACIDS AND ANYHDRIDES THEREOF IN AMOUNT SUCH THAT THE RATIO OF DICARBOXYLIC ACID GROUPS TO THE SUM OF THE TOTAL INTRODUCED SILICON-BONDED SILOXANE FUNCTIONAL GROUPS PLUS HYDROXYL GROUPS IS FROM .08 TO .75.
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) | 1955-02-04 | 1955-08-06 | 1956-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-04 | 1959-08-06 | 1960-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-04 | 1963-08-06 | 1964-02-05 | $7700.00 | Window Closed / Lapsed |