US3070555A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing organosiloxane elastomer foams
Assignee: Dow Silicones Corp
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Filing: 1959-04-20
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Granted: 1962-12-25
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Expires: 1979-04-20
Abstract
No abstract record available.
Inventors
- 👤 Jr Leonard B Bruner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:51
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/02; C08J2383/00; C08J2383/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
171 words
A METHOD OF PREPARING A SILOXANE ELASTOMERIC FOAM WHICH COMPRISES MIXING (1) AN ORGANOPOLYSILOXANE CONTAINING SILICON-BONDED OH GROUPS AND HAVING A VISCOSITY OF AT LEAST 50 CS. AT 25*C. AND HAVING PER SILICON ATOM ON THE AVERAGE FROM 1.9 TO 2 RADICALS, HALOGENATED MONOVALENT HYDROCARBON RADICALS, HALOGENATED MONOVALENT HYDROCARBON RADICALS AND HYDROGEN ATOMS, IN SAID SILOXANE THERE BEING FROM 1 TO 75% BY WEIGHT SILOXANE UNITS CONTAINING AT LEAST ONE SILICON-BONDED HYDROGEN ATOM AND SAID SILOXANE CONTAINING AN AVERAGE OF AT LEAST 1.25 TOTAL MONOVALENT HYDROCARBON RADICALS AND HALOGENATED MONOVALENT HYDROCARBON RADICALS PER SILICON ATOM, (2) UP TO 50% BY WEIGHT BASED ON THE WEIGHT OF SILOXANE (1) OF A HYDROXYLATED COMPOUND SELECTED FROM THE GROUP CONSISTING OF SILANOLS, LOW MOLECULAR WEIGHT HYDROXYLATED SILOXANES, WATER, CARBOXYLIC ACIDS AND ALCOHOLS OF LESS THAN TWELVE CARBON ATOMS, AND (3) A STANNOUS SALT OF A HYDROCARBON-SOLUBLE MONOCARBOXYLIC ACID IN AMOUNT SUFFICIENT TO GIVE FROM .1 TO 10% BY WEIGHT TIN BASED ON THE WEIGHT OF SILOXANE (1) AND THEREAFTER ALLOWING THE MIXTURE TO FOAM.
Claim 2
Independent Claim
171 words
A METHOD OF PREPARING A SILOXANE ELASTOMERIC FOAM WHICH COMPRISES MIXING (1) AN ORGANOPOLYSILOXANE CONTAINING SILICON-BONDED OH GROUPS AND HAVING A VISCOSITY OF AT LEAST 50 CS. AT 25*C. AND HAVING PER SILICON ATOM ON THE AVERAGE FROM 1.9 TO 2 RADICALS, HALOGENATED MONOVALENT HYDROCARBON RADICALS, HALOGENATED MONOVALENT HYDROCARBON RADICALS AND HYDROGEN ATOMS, IN SAID SILOXANE THERE BEING FROM 1 TO 75% BY WEIGHT SILOXANE UNITS CONTAINING AT LEAST ONE SILICON-BONDED HYDROGEN ATOM AND SAID SILOXANE CONTAINING AN AVERAGE OF AT LEAST 1.25 TOTAL MONOVALENT HYDROCARBON RADICALS AND HALOGENATED MONOVALENT HYDROCARBON RADICALS PER SILICON ATOM, (2) UP TO 50% BY WEIGHT BASED ON THE WEIGHT OF SILOXANE (1) OF A HYDROXYLATED COMPOUND SELECTED FROM THE GROUP CONSISTING OF SILANOLS, LOW MOLECULAR WEIGHT HYDROXYLATED SILOXANES, WATER, CARBOXYLIC ACIDS AND ALCOHOLS OF LESS THAN TWELVE CARBON ATOMS, AND (3) A STANNOUS SALT OF A HYDROCARBON-SOLUBLE MONOCARBOXYLIC ACID IN AMOUNT SUFFICIENT TO GIVE FROM .1 TO 10% BY WEIGHT TIN BASED ON THE WEIGHT OF SILOXANE (1) AND THEREAFTER ALLOWING THE MIXTURE TO FOAM.
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) | 1965-12-24 | 1966-06-25 | 1966-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-24 | 1970-06-25 | 1970-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-24 | 1974-06-25 | 1974-12-25 | $7700.00 | Window Closed / Lapsed |