US2993871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foamable silicone-glycol copolymer novolac compositions, method of preparing same and articles produced therefrom
Assignee: Owens Corning
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Filing: 1958-07-03
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Granted: 1961-07-25
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Expires: 1978-07-03
Abstract
No abstract record available.
Inventors
- 👤 Richard F Shannon
- 👤 Philip W Sullivan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:39
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08J2361/00; C08J2361/04; C08J2361/06; C08J2483/00; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/31504; Y10T428/31652; Y10T428/31663; Y10T428/31942; Y10T428/31949; Y10T428/31964; Y10T428/31967
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A FOAMABLE COMPOSITION COMPRISING ABOUT 80 PARTS OF A NOVOLAC RESIN, A QUANTITY OF A CURING AGENT WHICH IS REACTIVE WITH THE NOVOLAC RESIN, BY CONNECTING MOLECULES THEREOF THROUGH METHYLENE GROUPS, AND SUFFICIENT IN AMOUNT TO CONVERT, AT AN ELEVATED TEMPERATURE, THE NOVOLAC RESIN TO A THERMOSET CONDITION, AND FROM ABOUT 0.2 PART TO ABOUT 10 PARTS OF A COPOLYMER HAVING AN AVERAGE MOLECULAR WEIGHT FROM ABOUT 180 TO ABOUT 2000 OF A DIALKYLDIAKOXYSILANE AND A LIQUID DIHYDROXY ALIPHATIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALKYLENE GLYCOLS HAVING FROM 2 TO 6 CARBON ATOMS AND POLYOXYALKYLENE GLYCOLS HAVING FROM 4 TO 16 CARBON ATOMS.
Claim 2
Dependent Claim
105 words
A FOAMABLE COMPOSITION COMPRISING ABOUT 80 PARTS OF A NOVOLAC RESIN, A QUANTITY OF A CURING AGENT WHICH IS REACTIVE WITH THE NOVOLAC RESIN, BY CONNECTING MOLECULES THEREOF THROUGH METHYLENE GROUPS, AND SUFFICIENT IN AMOUNT TO CONVERT, AT AN ELEVATED TEMPERATURE, THE NOVOLAC RESIN TO A THERMOSET CONDITION, AND FROM ABOUT 0.2 PART TO ABOUT 10 PARTS OF A COPOLYMER HAVING AN AVERAGE MOLECULAR WEIGHT FROM ABOUT 180 TO ABOUT 2000 OF A DIALKYLDIAKOXYSILANE AND A LIQUID DIHYDROXY ALIPHATIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALKYLENE GLYCOLS HAVING FROM 2 TO 6 CARBON ATOMS AND POLYOXYALKYLENE GLYCOLS HAVING FROM 4 TO 16 CARBON ATOMS.
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) | 1964-07-24 | 1965-01-23 | 1965-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-24 | 1969-01-23 | 1969-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-24 | 1973-01-23 | 1973-07-25 | $7700.00 | Window Closed / Lapsed |