US3215643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Use of sulfur-containing siloxanes as solvent foamers
Assignee: Dow Silicones Corp
•
Filing: 1961-11-24
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Granted: 1965-11-02
•
Expires: 1981-11-24
Abstract
No abstract record available.
Inventors
- 👤 Daniel R Pail
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:38
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/22; C08G77/28; C09; C09K; C09K23/00; C09K23/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A COMPOSITION OF MATTER OF INCREASED FOAMING TENDENCIES CONSISTING ESSENTIALLY OF (1) A SOLVENT SELECTED FROM THE GROUP CONSISTING OF HYDROCARBONS AND HALOGENATED HYDROCARBONS CONTAINING THEREIN, (2) FROM 0.01 TO 10 PERCENT BY WEIGHT BASED UPON THE WEIGHT OF (1) OF A SULFUR-CONTAINING SILOXANE COPOLYMER CONTAINING AN AVERAGE OF FROM 1.75 TO 2.1 ORGANIC RADICALS PER SILICON ATOM, SAID COPOLYMER CONSISTING ESSENTIALLY OF (A) FROM 0.45 TO 12 MOL PERCENT UNITS OF THE FORMULA
Claim 2
Dependent Claim
74 words
A COMPOSITION OF MATTER OF INCREASED FOAMING TENDENCIES CONSISTING ESSENTIALLY OF (1) A SOLVENT SELECTED FROM THE GROUP CONSISTING OF HYDROCARBONS AND HALOGENATED HYDROCARBONS CONTAINING THEREIN, (2) FROM 0.01 TO 10 PERCENT BY WEIGHT BASED UPON THE WEIGHT OF (1) OF A SULFUR-CONTAINING SILOXANE COPOLYMER CONTAINING AN AVERAGE OF FROM 1.75 TO 2.1 ORGANIC RADICALS PER SILICON ATOM, SAID COPOLYMER CONSISTING ESSENTIALLY OF (A) FROM 0.45 TO 12 MOL PERCENT UNITS OF THE FORMULA
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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) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |