US2655485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Siloxane structural foams
Assignee: Dow Silicones Corp
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Filing: 1951-12-17
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Granted: 1953-10-13
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Expires: 1971-12-17
Abstract
No abstract record available.
Inventors
- 👤 Kenneth R Hoffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:12
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; C08J2383/00; C08J2383/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
THE METHOD OF PREPARING A SILOXANE STRUCTURAL FOAM COMPRISING HEATING AN ESSENTIALLY SOLVENT-FREE POLYSILOXANE RESIN TO A TEMPERATURE BELOW 130* C. WHEREBY TO RENDER THE RESIN FLUID, ADDING TO THE FLUID RESIN A FOAMING AGENT AND A CATALYST FOR CURING SILOXANE RESINS AND THEREAFTER HEATING THE MIXTUE TO A TEMPERATURE OF AT LEAST 130* C. WHEREBY THE FOAMING AGENT DECOMPOSES PRODUCING A RESIN FOAM, AND CONTINUING TO HEAT THE FOAM SO PRODUCED AT A TEMPERATURE ABOVE 130* C. UNTIL THE RESIN IS RENDERED INSOLUBLE AND INFUSIBLE, SAID SILOXANE RESIN BEING OF THE FORMULA
Claim 2
Independent Claim
93 words
THE METHOD OF PREPARING A SILOXANE STRUCTURAL FOAM COMPRISING HEATING AN ESSENTIALLY SOLVENT-FREE POLYSILOXANE RESIN TO A TEMPERATURE BELOW 130* C. WHEREBY TO RENDER THE RESIN FLUID, ADDING TO THE FLUID RESIN A FOAMING AGENT AND A CATALYST FOR CURING SILOXANE RESINS AND THEREAFTER HEATING THE MIXTUE TO A TEMPERATURE OF AT LEAST 130* C. WHEREBY THE FOAMING AGENT DECOMPOSES PRODUCING A RESIN FOAM, AND CONTINUING TO HEAT THE FOAM SO PRODUCED AT A TEMPERATURE ABOVE 130* C. UNTIL THE RESIN IS RENDERED INSOLUBLE AND INFUSIBLE, SAID SILOXANE RESIN BEING OF THE FORMULA
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) | 1956-10-12 | 1957-04-13 | 1957-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-12 | 1961-04-13 | 1961-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-12 | 1965-04-13 | 1965-10-13 | $7700.00 | Window Closed / Lapsed |