US2576486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organosilicon polyesters
Assignee: Dow Silicones Corp
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Filing: 1950-02-02
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Granted: 1951-11-27
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Expires: 1970-02-02
Abstract
No abstract record available.
Inventors
- 👤 Jr John Leopold Speier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:10
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/695; C08G63/6954; C08G63/6956
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
THE METHOD OF PREPARING ORGANOSILICON POLYESTERS WHICH COMPRISES INTERACTING A DICARBOXYLIC ACID AND A COMPOUND OF THE GENERAL FORMULA ACCH2R2SIOSIR2CH2AC IN WHICH AC REPRESENTS ACYLOXY IN WHICH THE ACYL GROUP IS THE ACYL GROUP OF A MONOBASIC MONOCARBOXYLIC ACID AND R REPRESENTS HYDROCARBON RADICALS SELECTED FROM THE GROUP CONSISTING OF ALKYL AND ARYL RADICALS AND THE REMOVAL OF THE CARBOXY ACID FORMED DURING THE COURSE OF THE REACTION.
Claim 2
Independent Claim
68 words
THE METHOD OF PREPARING ORGANOSILICON POLYESTERS WHICH COMPRISES INTERACTING A DICARBOXYLIC ACID AND A COMPOUND OF THE GENERAL FORMULA ACCH2R2SIOSIR2CH2AC IN WHICH AC REPRESENTS ACYLOXY IN WHICH THE ACYL GROUP IS THE ACYL GROUP OF A MONOBASIC MONOCARBOXYLIC ACID AND R REPRESENTS HYDROCARBON RADICALS SELECTED FROM THE GROUP CONSISTING OF ALKYL AND ARYL RADICALS AND THE REMOVAL OF THE CARBOXY ACID FORMED DURING THE COURSE OF THE REACTION.
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) | 1954-11-26 | 1955-05-28 | 1955-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-26 | 1959-05-28 | 1959-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-26 | 1963-05-28 | 1963-11-27 | $7700.00 | Window Closed / Lapsed |