US2553643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polysiloxane resin containing an aryl phosphinic acid or diaryl ester thereof
Assignee: Interchemical Corp
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Filing: 1947-12-02
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Granted: 1951-05-22
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Expires: 1967-12-02
Abstract
No abstract record available.
Inventors
- 👤 Jr Howard Ellerhorst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:31
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/53; C08K5/5393
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A COMPOSITION OF MATTER COMPRISING HEATHARDENABLE HYDROCARBON SUBSTITUTED POLYSILOXANE RESIN, THE AVERAGE NUMBER OF HYDROC ARBON GROUPS ATTACHED TO SILICON ATOMS IN SAID RESIN BEING MORE THAN ONE AND LESS THAN TWO PER SILICON ATOM, AND FROM 2 TO 5% BY WEIGHT, BASED ON POLYSILOXANE RESIN, OF AN ORGANIC PHOSPHORUS COMPOUND OF THE CLASS CONSISTING OF MONO-ARYLPHOSPHINIC ACIDS, OF EMPIRICAL FORMULA RPO2H2 AND ARYL ESTER OF MONO-ARYLPHOSPHINIC ACIS OF EMPIRICAL FORMULA R3PO2 WHEREIN R IS AN ARYL GROUP.
Claim 2
Dependent Claim
78 words
A COMPOSITION OF MATTER COMPRISING HEATHARDENABLE HYDROCARBON SUBSTITUTED POLYSILOXANE RESIN, THE AVERAGE NUMBER OF HYDROC ARBON GROUPS ATTACHED TO SILICON ATOMS IN SAID RESIN BEING MORE THAN ONE AND LESS THAN TWO PER SILICON ATOM, AND FROM 2 TO 5% BY WEIGHT, BASED ON POLYSILOXANE RESIN, OF AN ORGANIC PHOSPHORUS COMPOUND OF THE CLASS CONSISTING OF MONO-ARYLPHOSPHINIC ACIDS, OF EMPIRICAL FORMULA RPO2H2 AND ARYL ESTER OF MONO-ARYLPHOSPHINIC ACIS OF EMPIRICAL FORMULA R3PO2 WHEREIN R IS AN ARYL GROUP.
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) | 1954-05-21 | 1954-11-20 | 1955-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-21 | 1958-11-20 | 1959-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-21 | 1962-11-20 | 1963-05-22 | $7700.00 | Window Closed / Lapsed |