US3019204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hardenable polysiloxane compositions and curing catalysts therefor
Assignee: Ranson & Randolph Co
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Filing: 1957-10-24
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Granted: 1962-01-30
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Expires: 1977-10-24
Abstract
No abstract record available.
Inventors
- 👤 Jerome A Preston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:49
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/56; C08K5/16; C08K5/22; C08K5/23; C08K5/57
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
131 words
A METHOD FOR PRODUCING A CURED SILICONE MATERIAL WHICH COMPRISES ESTABLISHING A BODY OF A HARDENABLE POLYDIMETHYLSILOXANE, MIXING WITH THE POLYDIMETHYLSILOXANE A CURING CATALYST WHICH IS A SOLUTION COMPRISING TIN AND LITHIUM, SAID TIN AND LITHIUM EACH BEING PRESENT AS PART OF AN ORGANIC COMPOUND WHICH IS SOLUBLE IN THE POLYDIMETHYLSILOXANE, AND BEING ADDED TO THE EXTENT OF FROM ABOUT 0.0001 PERCENT TO ABOUT 1 PERCENT, BASED UPON THE WEIGHT OF THE POLYDIMETHYLSILOXANE, AND IN AN AMOUNT SUFFICIENT TO CONVERT THE SAID RESIN TO A HARDENED, TACK-FREE STATE, THE WEIGHT RATIO OF LITHIUM TO TIN BEING AT LEAST 1:3, BUT NOT GREATER THAN 6:1, SHAPING THE RESULTING MIXTURE INTO A DESIRED CONFIGURATION, AND MAINTAIN ING THE MIXTURE IN SUCH CONFIGURATION UNTIL CURE OF THE POLYDIMETHYLSILOXANE HAS PROCEEDED TO A REQUIRED EXTENT.
References Cited (Backward Citations)
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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) | 1965-01-29 | 1965-07-31 | 1966-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-29 | 1969-07-31 | 1970-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-29 | 1973-07-31 | 1974-01-30 | $7700.00 | Window Closed / Lapsed |