US3330797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fusible elastomers from mixtures of polysiloxanes containing methyl, vinyl and hydrogen groups with boron modified siloxanes and peroxides
Assignee: Imperial Chemical Industries Ltd
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Filing: 1963-09-19
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Granted: 1967-07-11
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Expires: 1983-09-19
Abstract
No abstract record available.
Inventors
- 👤 Kelly Patrick Mcavoy
- 👤 Ames Jack
- 👤 Somerville James Cargill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:43
CPC Classifications
C; C08; C08L; C08L83/00; C08L83/04; C08G; C08G77/00; C08G77/04; C08G77/12; C08G77/20
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
133 words
A COMPOSITION COMPRISING (A) 100 PARTS BY WEIGHT OF A METHYLVINYLPOLYSILOXANE HAVING FROM 1.98 TO 2.01 ORGANO GROUPS PER SILICON ATOM, AND HAVING AN AVERAGE MOLECULAR WEIGHT NOT LESS THAN 2X10**5, (B) A LINEAR METHYLHYDROGENPOLYSILOXANE HAVING NOT LESS THAN 0.50 SILICONBONDED HYDROGEN ATOMS PER SILICON-ATOM AND OF AVERAGE MOLECULAR WEIGHT NOT GREATER THAN 20,000 IN AN AMOUNT OF UP TO 20 PARTS BY WEIGHT, (C) FROM 5 TO 60 PARTS BY WEIGHT OF THE PRODUCT OBTAINED BY REACTING DIMETHYLPOLYSILOXANE AND A BORON COMPOUND SELECTED FROM THE GROUP CONSISTING OF BORIC ACID AND BORIC OXIDE AT ABOUT 100 TO 250*C., (D) 15 TO 100 PARTS BY WEIGHT OF A FILLER SETTLED FROM THE GROUP CONSISTING OF REINFORCING FILLERS AND SEMIREINFORCING FILLERS AND (E) 0.5 TO 10 PARTS BY WEIGHT OF A PEROXIDE CURING AGENT.
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) | 1970-07-10 | 1971-01-09 | 1971-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-10 | 1975-01-09 | 1975-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-10 | 1979-01-09 | 1979-07-11 | $7700.00 | Window Closed / Lapsed |