Patent US4397722A successfully refreshed from Google Patents.
US4397722A
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Polymers from aromatic silanes and process for their preparation
Assignee: International Business Machines Corp
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Filing: 1982-08-09
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Granted: 1983-08-09
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Expires: 2002-08-09
Abstract
Abstract Thermally stable electrically insulating polymers are obtained from aromatic silanes by low power, radio frequency glow discharge polymerization at elevated temperature and low vapor pressure.
Inventors
- 👤 Ivan Haller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:39
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/60; C09; C09D; C09D4/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
24 words
A polymer formed by low power, radio frequency glow discharge polymerization of a completely aromatic silane monomer at elevated temperature and low vapor pressure.
Claim 2
Dependent Claim
24 words
A polymer formed by low power, radio frequency glow discharge polymerization of a completely aromatic silane monomer at elevated temperature and low vapor pressure.
Claim 3
Dependent Claim
12 words
The polymer as claimed in claim 1 wherein the monomer is phenylsilane.
Claim 4
Dependent Claim
12 words
The polymer as claimed in claim 1 wherein the monomer is diphenylsilane.
Claim 5
Dependent Claim
12 words
The polymer as claimed in claim 1 wherein the monomer is disilylbenzene.
Claim 6
Dependent Claim
12 words
The polymer as claimed in claim 1 wherein the monomer is parachlorophenylsilane.
Claim 7
Dependent Claim
30 words
A process for forming a polymer, said process comprising the low power, radio frequency glow discharge polymerization at elevated temperature and low vapor pressure of a completely aromatic silane monomer.
Claim 8
Dependent Claim
30 words
A process for forming a polymer, said process comprising the low power, radio frequency glow discharge polymerization at elevated temperature and low vapor pressure of a completely aromatic silane monomer.
Claim 9
Dependent Claim
12 words
The process as claimed in claim 6 wherein the monomer is phenylsilane.
Claim 10
Dependent Claim
12 words
A process as claimed in claim 6 wherein the monomer is diphenylsilane.
Claim 11
Dependent Claim
12 words
A process as claimed in claim 6 wherein the monomer is disilylbenzene.
Claim 12
Dependent Claim
12 words
A process as claimed in claim 6 wherein the monomer is parachlorophenylsilane.
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) | 1986-08-08 | 1987-02-07 | 1987-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-08 | 1991-02-07 | 1991-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-08 | 1995-02-07 | 1995-08-09 | $7700.00 | Window Closed / Lapsed |