Patent US3790612A successfully refreshed from Google Patents.
US3790612A
Expired / Lapsed
US
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Organopolysiloxane copolymer useful as surfactant
Assignee: General Electric Co
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Filing: 1971-10-14
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Granted: 1974-02-05
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Expires: 1991-10-14
Abstract
Abstract AN ORGANOPOLYSILOXANE COPOLYMER OF THE FORMULA, R2-(CNH2N-O)X-R3-R2-SI-O-(R2-SI-O)A-(SI(-R)-O-(R''- (CNH2N-O)X-R2))B-R2-SI-R3-(CNH2N-O)X-R2 WHEREIN R, R2 ARE LOWER MONOVALENT HYDROCARBON RADICALS, R'' AND R3 ARE LOWER DIVALENT HYDROCARBON RADICALS, A HAS A VALUE OF AT LEAST 4, B HAS A VALUE OF AT LEAST 1, N HAS A VALUE OF FROM 2 TO 4 AND X HAS A VALUE OF AT LEAST 5.
Inventors
- 👤 W Raleigh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:44
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08G; C08G77/00; C08G77/42; C08G77/46; C08J2375/00; C08J2375/04; C08J2483/00
Claims Analysis
Total Claims: 0
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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) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |