Patent US2917480A successfully refreshed from Google Patents.
US2917480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Siloxane oxyalkylene block copolymers
Assignee: Union Carbide Corp
•
Filing: 1954-06-10
•
Granted: 1959-12-15
•
Expires: 1974-06-10
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 16:54
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/42; C08G77/46; B; B01; B01D; B01D19/00; B01D19/02; B01D19/04; B01D19/0404; B01D19/0409; C08L; C08L83/00; C08L83/04; Y; Y10; Y10S; Y10S516/00; Y10S516/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
A COMPOSITION OF MATTER COMPRISING A MIXTURE OF BLOCK COPOLYMERS WHEREIN SUCH COPOLYMER CONTAINS FROM ONE TO TWO SILOXANE POLYMERS AND FROM ONE TO TWO OXYALKYLENE POLYMERS IN COMBINATION, EACH SILOXANE POLYMER BEING COMPOSED OF AT LEAST TWO SILICON ATOMS, EACH HAVING TWO SILICON-BONDED MONOVALENT HYDROCARBON GROUPS, JOINED THROUGH OXYSILICON BONDS AND BONDED AT ONE END TO ONE OXYALKYLENE POLYMER AND AT THE OTHER END TO A MEMBER FROM THE CLASS CONSISTING OF A MONOVALENT HYDROCARBON GROUP AND THE SECOND OXYALKYLENE POLYMER THROUGH CARBON-OXY-SILICON BOND, AND EACH OXYALKYLENE POLYMER BEING COMPOSED OF AT LEAST FIVE OXYALKYLENE GROUPS JOINED TO EACH OTHER BY OXYCARBON BONDS AND BONDED AT ONE END TO ONE SILOXANE POLYMER THROUGH A CARBON-OXY-SILICON BOND AND AT THE OTHER END TO A GROUP FROM THE CLASS CONSISTING OF MONOVALENT HYDROCARBONOXY GROUP THROUGH AN OXYCARBON BOND AND THE SECOND SILOXANE POLYMER THROUGH A CARBON-OXY-SILICON BOND.
Claim 2
Dependent Claim
146 words
A COMPOSITION OF MATTER COMPRISING A MIXTURE OF BLOCK COPOLYMERS WHEREIN SUCH COPOLYMER CONTAINS FROM ONE TO TWO SILOXANE POLYMERS AND FROM ONE TO TWO OXYALKYLENE POLYMERS IN COMBINATION, EACH SILOXANE POLYMER BEING COMPOSED OF AT LEAST TWO SILICON ATOMS, EACH HAVING TWO SILICON-BONDED MONOVALENT HYDROCARBON GROUPS, JOINED THROUGH OXYSILICON BONDS AND BONDED AT ONE END TO ONE OXYALKYLENE POLYMER AND AT THE OTHER END TO A MEMBER FROM THE CLASS CONSISTING OF A MONOVALENT HYDROCARBON GROUP AND THE SECOND OXYALKYLENE POLYMER THROUGH CARBON-OXY-SILICON BOND, AND EACH OXYALKYLENE POLYMER BEING COMPOSED OF AT LEAST FIVE OXYALKYLENE GROUPS JOINED TO EACH OTHER BY OXYCARBON BONDS AND BONDED AT ONE END TO ONE SILOXANE POLYMER THROUGH A CARBON-OXY-SILICON BOND AND AT THE OTHER END TO A GROUP FROM THE CLASS CONSISTING OF MONOVALENT HYDROCARBONOXY GROUP THROUGH AN OXYCARBON BOND AND THE SECOND SILOXANE POLYMER THROUGH A CARBON-OXY-SILICON BOND.
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) | 1962-12-14 | 1963-06-15 | 1963-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-14 | 1967-06-15 | 1967-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-14 | 1971-06-15 | 1971-12-15 | $7700.00 | Window Closed / Lapsed |