Patent US3208961A successfully refreshed from Google Patents.
US3208961A
Expired / Lapsed
US
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In situ catalyst forming compositions and process
Assignee: Dow Silicones Corp
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Filing: 1963-05-13
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Granted: 1965-09-28
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Expires: 1983-05-13
Abstract
No abstract record available.
Inventors
- 👤 Gust J Kookootsedes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:11
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/18; C08K3/24; C08K3/26; C08K3/20; C08K3/22; C08K5/00; C08K5/04; C08K5/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A COMPOSITION CONSISTING ESSENTIALLY OF A PHENYLSILOXANE RESIN HAVING A C6H5:SI RATIO OF .6:1 TO .9:1, AN R:SI RATIO OF .4:1 TO 1.2:1, R BEING A MEMBER SELECTED FROM THE GROUP CONSISTING OF MONOVALENT HYDROCARBON AND HALOGENATED MONOVALENT HYDROCARBON GROUPS, A TOTAL PHENYL PLUS R:SI RATIO OF 1:1 TO 1.7:1 AND CONTAINING AT LEAST 0.25 PERCENT BY WEIGHT OF SILICON-BONDED OH GROUPS, A FILLER AND A CATALYTIC AMOUNT OF A CATALYST COMBINATION WHICH CONSISTS ESSENTIALLY OF A LEAD COMPOUND SELECTED FROM THE GROUP CONSISTING OF LEAD MONOXIDE AND LEAD CARBONATE AND A COMPOUND SELECTED FROM THE GROUP CONSISTING OF CARBOXYLIC ACIDS AND THE AMMONIUM SALTS OF CARBOXYLIC ACIDS.
Claim 2
Dependent Claim
108 words
A COMPOSITION CONSISTING ESSENTIALLY OF A PHENYLSILOXANE RESIN HAVING A C6H5:SI RATIO OF .6:1 TO .9:1, AN R:SI RATIO OF .4:1 TO 1.2:1, R BEING A MEMBER SELECTED FROM THE GROUP CONSISTING OF MONOVALENT HYDROCARBON AND HALOGENATED MONOVALENT HYDROCARBON GROUPS, A TOTAL PHENYL PLUS R:SI RATIO OF 1:1 TO 1.7:1 AND CONTAINING AT LEAST 0.25 PERCENT BY WEIGHT OF SILICON-BONDED OH GROUPS, A FILLER AND A CATALYTIC AMOUNT OF A CATALYST COMBINATION WHICH CONSISTS ESSENTIALLY OF A LEAD COMPOUND SELECTED FROM THE GROUP CONSISTING OF LEAD MONOXIDE AND LEAD CARBONATE AND A COMPOUND SELECTED FROM THE GROUP CONSISTING OF CARBOXYLIC ACIDS AND THE AMMONIUM SALTS OF CARBOXYLIC ACIDS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |