US2834748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Siloxane-oxyalkylene block copolymers
Assignee: Union Carbide Corp
•
Filing: 1954-03-22
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Granted: 1958-05-13
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Expires: 1974-03-22
Abstract
No abstract record available.
Inventors
- 👤 Donald L Bailey
- 👤 Francis M O'connor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:51
CPC Classifications
C; C08; C08G; C08G77/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A COMPOSITION OF MATTER COMPRISING A MIXTURE OF BLOCK COPOLYMERS WHEREIN EACH COPOLYMER CONTAINS A SILOXANE POLYMER AND AT LEAST ONE OXYALKYLENE POLYMER IN COMBINATION, THE SILOXANE POLYMER BEING COMPOSED OF AT LEAT ONE TRIFUNCTIONAL SILICON ATOM, BONDED TO THREE OXYGEN ATOMS AND A SINGLE MONOVALENT HYDROCARBON RADICAL, AND JOINED TO AT LEAST THREE DIFUNCTIONAL SILICON ATOMS THROUGH OXYSILICON BONDS, EACH OF SAID DIFUNCTIONAL SILICON ATOMS HAVING TWO MONOVALENT HYDROCARBON RADICALS BONDED THERETO AND THE OXYALKYLENE POLYMER BEING COMPOSED OF AT LEAST FIVE OXYALKYLENE GROUPS BONDED TO EACH OTHER BY OXYCARBON BONDS AND BONDED AT ONE END TO THE SILOXANE POLYMER THROUGH A CARBON-OXY-SILICON BOND AND BONDED AT THE OTHER END TO A MONOETHER RADICAL.
Claim 2
Dependent Claim
115 words
A COMPOSITION OF MATTER COMPRISING A MIXTURE OF BLOCK COPOLYMERS WHEREIN EACH COPOLYMER CONTAINS A SILOXANE POLYMER AND AT LEAST ONE OXYALKYLENE POLYMER IN COMBINATION, THE SILOXANE POLYMER BEING COMPOSED OF AT LEAT ONE TRIFUNCTIONAL SILICON ATOM, BONDED TO THREE OXYGEN ATOMS AND A SINGLE MONOVALENT HYDROCARBON RADICAL, AND JOINED TO AT LEAST THREE DIFUNCTIONAL SILICON ATOMS THROUGH OXYSILICON BONDS, EACH OF SAID DIFUNCTIONAL SILICON ATOMS HAVING TWO MONOVALENT HYDROCARBON RADICALS BONDED THERETO AND THE OXYALKYLENE POLYMER BEING COMPOSED OF AT LEAST FIVE OXYALKYLENE GROUPS BONDED TO EACH OTHER BY OXYCARBON BONDS AND BONDED AT ONE END TO THE SILOXANE POLYMER THROUGH A CARBON-OXY-SILICON BOND AND BONDED AT THE OTHER END TO A MONOETHER RADICAL.
References Cited (Backward Citations)
US2476307A
Cited
US2559342A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-12 | 1961-11-11 | 1962-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-12 | 1965-11-11 | 1966-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-12 | 1969-11-11 | 1970-05-13 | $7700.00 | Window Closed / Lapsed |