US4279723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of inorganic element-containing monomers using plasma
Assignee: University of California, San Diego
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Filing: 1979-05-31
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Granted: 1981-07-21
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Expires: 1999-05-31
Abstract
Abstract An ionized gas plasma is established in an electrical field in contact with a non-vapor volume monomer (liquid and/or solid). The plasma causes polymerization of the monomers which are of the phosphazene or carborane type.
Inventors
- 👤 Yoshihito Osada
- 👤 Alexis T. Bell
- 👤 Mitchel M. Shen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:08
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/46; C08F2/52; C01; C01B; C01B21/00; C01B21/082; C01B21/097; C01B21/098; C01B21/0986; C08G; C08G79/00; C08G79/02; C08G79/025; C08G85/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
55 words
A method for the polymerization of a phosphazene monomer comprising establishing and maintaining a contained zone of ionized gas plasma at an energy of less than 100 eV by applying an electric field, said gas plasma being in contact with the surface of a non-vapor volume of said phosphazene monomer to cause it to polymerize.
Claim 2
Independent Claim
55 words
A method for the polymerization of a phosphazene monomer comprising establishing and maintaining a contained zone of ionized gas plasma at an energy of less than 100 eV by applying an electric field, said gas plasma being in contact with the surface of a non-vapor volume of said phosphazene monomer to cause it to polymerize.
Claim 3
Dependent Claim
57 words
The method of claim 1 in which the structural formula of said phosphazene polymer product is the following: ##STR4## wherein n=the number of repeating units, and Y and Z are selected from the group consisting of chloride, bromide, fluoride, OR, NHR, NR 2 , and R, wherein R is an aliphatic or aromatic group, and mixtures thereof.
Claim 4
Dependent Claim
18 words
The method of claim 1 in which said phosphazene monomer is in crystalline solid form during plasma contact.
Claim 5
Dependent Claim
12 words
The method of claim 1 in which said phosphazene monomer comprises dichlorophosphazene.
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) | 1984-07-20 | 1985-01-19 | 1985-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-20 | 1989-01-19 | 1989-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-20 | 1993-01-19 | 1993-07-21 | $7700.00 | Window Closed / Lapsed |