Patent US2873265A successfully refreshed from Google Patents.
US2873265A
Expired / Lapsed
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Process for preparing copolymers of organo silicon derivatives
Assignee: Ellis Foster Co
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Filing: 1950-05-12
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Granted: 1959-02-10
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Expires: 1970-05-12
Abstract
No abstract record available.
Inventors
- 👤 John B Rust
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:24
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/20; C08G77/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
THE METHOD OF PREPARING COPOLYMERS WHICH COMPRISES COHYDROLYZING BY WATER THE HALOGEN ONLY OF AN IRGANOSILICON HALIDE HAVING AN SI-H BOND WITH A NONSI-H CONTAINNING ORGANOSILICON HALIDE HAVING ORGANO AND HALOGEN GROUPS ONLY ATTAACHED TO SILICON, ALL VALENCES OF SILICON OTHER THAN SI-H BOND BEING ATTACHED TO HALOGEN AND TO CARBON OF ORGANO GROUPS THE RATIO OF THE REACTANTS BEING FROM 2:1 TO 1:3 BY WEIGHT.
Claim 2
Independent Claim
66 words
THE METHOD OF PREPARING COPOLYMERS WHICH COMPRISES COHYDROLYZING BY WATER THE HALOGEN ONLY OF AN IRGANOSILICON HALIDE HAVING AN SI-H BOND WITH A NONSI-H CONTAINNING ORGANOSILICON HALIDE HAVING ORGANO AND HALOGEN GROUPS ONLY ATTAACHED TO SILICON, ALL VALENCES OF SILICON OTHER THAN SI-H BOND BEING ATTACHED TO HALOGEN AND TO CARBON OF ORGANO GROUPS THE RATIO OF THE REACTANTS BEING FROM 2:1 TO 1:3 BY WEIGHT.
References Cited (Backward Citations)
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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) | 1962-02-09 | 1962-08-11 | 1963-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-09 | 1966-08-11 | 1967-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-09 | 1970-08-11 | 1971-02-10 | $7700.00 | Window Closed / Lapsed |