Patent US2570090A successfully refreshed from Google Patents.
US2570090A
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Carboxyphenylpolysiloxane-polyhydric alcohol copolymers
Assignee: Dow Silicones Corp
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Filing: 1949-07-05
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Granted: 1951-10-02
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Expires: 1969-07-05
Abstract
No abstract record available.
Inventors
- 👤 Arthur J Barry
- 👤 John W Gilkey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:37
CPC Classifications
C; C08; C08G; C08G77/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A POLYESTER COMPOSED OF A POLYSILOXANE HAVING A DEGREE OF SUBSTITUTION OF FROM 1.9 TO 3 ORGANIC RADICALS PER SILICON ATOM, SAID RADICALS BEING SELECTED FROM THE GROUP CONSISTING OF CARBOXYPHENYL, TOLYL, PHENYL AND METHYL RADICALS IN WHICH POLYSILOXANE THERE IS FROM ONE CARBOXYPHENYL RADICAL PER 4000 SILICON ATOMS TO ONE CARBOXYPHENYL RADICAL PER SILICON ATOM, THERE BEING AT LEAST TWO CARBOXYPHENYL RADICALS PER SILOXANE MOLECULE, AND A POLYHYDRIC ALCOHOL SELECTED FROM THE GROUP CONSISTING OF ETHYLENE GLYCOL, GLYCEROL AND BIS-HYDROXYMETHYLDIMETHYLSILANE, IN WHICH POLYESTER THE POLYSILOXANE AND THE ALCOHOL ARE LINKED TOGETHER BY
Claim 2
Dependent Claim
93 words
A POLYESTER COMPOSED OF A POLYSILOXANE HAVING A DEGREE OF SUBSTITUTION OF FROM 1.9 TO 3 ORGANIC RADICALS PER SILICON ATOM, SAID RADICALS BEING SELECTED FROM THE GROUP CONSISTING OF CARBOXYPHENYL, TOLYL, PHENYL AND METHYL RADICALS IN WHICH POLYSILOXANE THERE IS FROM ONE CARBOXYPHENYL RADICAL PER 4000 SILICON ATOMS TO ONE CARBOXYPHENYL RADICAL PER SILICON ATOM, THERE BEING AT LEAST TWO CARBOXYPHENYL RADICALS PER SILOXANE MOLECULE, AND A POLYHYDRIC ALCOHOL SELECTED FROM THE GROUP CONSISTING OF ETHYLENE GLYCOL, GLYCEROL AND BIS-HYDROXYMETHYLDIMETHYLSILANE, IN WHICH POLYESTER THE POLYSILOXANE AND THE ALCOHOL ARE LINKED TOGETHER BY
References Cited (Backward Citations)
US1970510A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-01 | 1955-04-02 | 1955-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-01 | 1959-04-02 | 1959-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-01 | 1963-04-02 | 1963-10-02 | $7700.00 | Window Closed / Lapsed |