Patent US3576022A successfully refreshed from Google Patents.
US3576022A
Expired / Lapsed
US
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Organosilicon compounds
Assignee: Midland Silicones Ltd
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Filing: 1968-10-03
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Granted: 1971-04-20
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Expires: 1988-10-03
Abstract
Abstract SILAZANE ENDBLOCK SILOXANES OF THE FORMULA (R3SI)2NSIR''2OSIR"2)2O WHERE R, R'' AND R" ARE DEFINED ORGANIC RADICALS AND R CAN ALSO BE HYDROGEN.
Inventors
- 👤 Richard P Bush
- 👤 Christopher A Pearce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:52
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/10; B; B01; B01D; B01D19/00; B01D19/02; B01D19/04; B01D19/0404; B01D19/0409
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) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |