US3624030A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organosilsesquioxanes
Assignee: SOC IND DES SILICONES
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Filing: 1969-11-13
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Granted: 1971-11-30
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Expires: 1989-11-13
Abstract
Abstract Solventless, time-stable, polymerizable polycondensates of at least 75 mol. percent RSiO1.5 units where R is methyl, vinyl or a hydrogen atom and up to 25 mol. percent of the units are SiO2, (CH3)2SiO, CH3(H)SiO or (CH3)3SiO0.5, are useful intermediates which react with other silicones and organic polymers to find use in making electrical insulation, laminating compounds and molding compounds.
Inventors
- 👤 Pierre A Pruvost
- 👤 Michel L Bourbon
- 👤 Michel Vialle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:47
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/06
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
18 words
The solventless, time-stable, polymerizable polycondensate of claim 1 in which all of the R groups are methyl radicals.
Claim 2
Dependent Claim
25 words
The polycondensate of claim 2 having from 0.75 to 1.15 methyl radicals per silicon atom and from 0.07 to 0.5 hydroxyl groups per silicon atom.
Claim 3
Dependent Claim
19 words
The polycondensate of claim 3 having one methyl radical per silicon atom and 0.13 hydroxyl group per silicon atom.
Claim 4
Dependent Claim
19 words
The polycondensate of claim 3 having one methyl radical per silicon atom and 0.2 hydroxyl group per silicon atom.
Claim 5
Dependent Claim
19 words
The polycondensate of claim 3 having one methyl radical per silicon atom and 0.5 hydroxyl group per silicon atom.
Claim 6
Dependent Claim
19 words
The polycondensate of claim 3 having 0.95 methyl radical per silicon atom and 0.2 hydroxyl group per silicon atom.
Claim 7
Dependent Claim
19 words
The polycondensate of claim 3 having 0.9 methyl radical per silicon atom and 0.25 hydroxyl group per silicon atom.
Claim 8
Dependent Claim
19 words
The polycondensate of claim 3 having 0.75 methyl radical per silicon atom and 0.4 hydroxyl group per silicon atom.
Claim 9
Dependent Claim
19 words
The polycondensate of claim 3 having 1.03 methyl radicals per silicon atom and 0.13 hydroxyl group per silicon atom.
Claim 10
Dependent Claim
19 words
The polycondensate of claim 3 having 1.05 methyl radicAls per silicon atom and 0.07 hydroxyl group per silicon atom.
Claim 11
Dependent Claim
19 words
The polycondensate of claim 3 having 1.07 methyl radicals per silicon atom and 0.075 hydroxyl group per silicon atom.
Claim 12
Dependent Claim
19 words
The polycondensate of claim 3 having 1.10 methyl radicals per silicon atom and 0.11 hydroxyl group per silicon atom.
Claim 13
Dependent Claim
19 words
The polycondensate of claim 3 having 1.15 methyl radicals per silicon atom and 0.15 hydroxyl group per silicon atom.
Claim 14
Dependent Claim
10 words
The polycondensate of claim 1 of the formula (CH2 CHSiO1.5)7O0.5H.
Claim 15
Dependent Claim
27 words
The polycondensate of claim 1 having CH3SiO1.5 units and HSiO1.5 units and having 0.095 silicon-bonded hydrogen atom per silicon atom and 0.08 hydroxyl group per silicon atom.
Claim 16
Dependent Claim
27 words
The polycondensate of claim 1 having CH3SiO1.5 units and HSiO1.5 units and having 0.30 silicon-bonded hydrogen atom per silicon atom and 0.144 hydroxyl group per silicon atom.
Claim 17
Dependent Claim
39 words
The polycondensate of claim 1 which consists essentially of 71.6 mole percent CH3SiO1.5 units, 8.0 mole percent CH2 CHSiO1.5 units, 6.0 mole percent CH3(H)SiO units and 14.4 mole percent (CH3)3SiO0.5 units and having 0.008 hydroxyl groups per silicon atom.
Claim 18
Dependent Claim
19 words
The polycondensate of claim 1 having 0.5 ethoxy group per silicon atom and one methyl radical per silicon atom.
Claim 19
Dependent Claim
19 words
The polycondensate of claim 1 having 0.75 ethoxy group per silicon atom and one methyl radical per silicon atom.
Claim 20
Dependent Claim
19 words
The polycondensate of claim 1 having 0.05 acetoxy group per silicon atom and one methyl radical per silicon atom.
Claim 21
Dependent Claim
23 words
A solventless, polymerizable polycondensate consisting essentially of chemically combined SiO2 units and HSiO1.5 units and having 0.73 silicon-bonded hydrogen atoms per silicon atom.
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) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |