Patent US3335287A successfully refreshed from Google Patents.
US2676163A
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Method of preparing siloxane polymers utilizing silazanes
Assignee: Dow Silicones Corp
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Filing: 1952-09-03
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Granted: 1954-04-20
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Expires: 1972-09-03
Abstract
No abstract record available.
Inventors
- 👤 John L Speier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:31
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/48; C08G77/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A METHOD OF POLYMERIZING A HYDROXYLATED ORGANOSILICON COMPOUND CONTAINING AT LEAST .6 PER CENT BY WEIGHT SILICON BONDED HYDROXYL GROUPS AND FRROM .9 TO 3 MONOVALENT HYDROCARBON RADICALS FREE OF C=C LINKAGES PER SILICON ATOM, IN SAID ORGANOSILICON COMPOUND ANY REMAINING VALENCES OF THE SILICON BEING SATISFIED BY OXYGEN ATOMS, WHICH METHOD COMPRISES REACTING SAID ORGANOSILICON COMPOUND WITH AN ORGANOSILIAZANE OF THE FORMULA
Claim 2
Independent Claim
63 words
A METHOD OF POLYMERIZING A HYDROXYLATED ORGANOSILICON COMPOUND CONTAINING AT LEAST .6 PER CENT BY WEIGHT SILICON BONDED HYDROXYL GROUPS AND FRROM .9 TO 3 MONOVALENT HYDROCARBON RADICALS FREE OF C=C LINKAGES PER SILICON ATOM, IN SAID ORGANOSILICON COMPOUND ANY REMAINING VALENCES OF THE SILICON BEING SATISFIED BY OXYGEN ATOMS, WHICH METHOD COMPRISES REACTING SAID ORGANOSILICON COMPOUND WITH AN ORGANOSILIAZANE OF THE FORMULA
References Cited (Backward Citations)
US2503919A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-19 | 1957-10-19 | 1958-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-19 | 1961-10-19 | 1962-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-19 | 1965-10-19 | 1966-04-20 | $7700.00 | Window Closed / Lapsed |