US4328146A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for improving characteristics of polymethylpentene through addition of coated mica particles
Assignee: Individual
•
Filing: 1979-09-24
•
Granted: 1982-05-04
•
Expires: 1999-09-24
Abstract
Abstract A method for reducing heat distortion but retaining high dielectric properties and volume resistivity of polymethylpentene. The method comprises dry blending chlorinated paraffin wax on mica particles and mixing so as to coat the mica particles and thereafter mixing with polymethylpentene in a blender so as not to break the mica particles or strip the wax coating therefrom. The resulting compound is then fed into an extruder at temperatures of about 325° F. to 475° F. The resulting material is then pelletized or strand cut.
Inventors
- 👤 Robert Andy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:43
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01B3/441; C; C08; C08K; C08K9/00; C08K9/08; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2911
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
23 words
A composition of polymethylpentene including particles of mica coated with a binder and comprising about 10% to 60% by volume of binder-coated mica.
Claim 2
Dependent Claim
23 words
A composition of polymethylpentene including particles of mica coated with a binder and comprising about 10% to 60% by volume of binder-coated mica.
Claim 3
Dependent Claim
27 words
A product as recited in claim 1 wherein said binder is chlorinated paraffin wax and wherein said wax comprises, by volume, about 2% of the mica particles.
References Cited (Backward Citations)
CA772592A
Cited
US2954552A
Cited
US3655565A
Cited
US3951680A
Cited
US4173492A
Cited
US4066604A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-05-03 | 1985-11-02 | 1986-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-03 | 1989-11-02 | 1990-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-03 | 1993-11-02 | 1994-05-04 | $7700.00 | Window Closed / Lapsed |