Patent US3922383A successfully refreshed from Google Patents.
US3922383A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric laminates
Assignee: Universal Oil Products Co
•
Filing: 1974-02-28
•
Granted: 1975-11-25
•
Expires: 1994-02-28
Abstract
Abstract Polymeric laminates either of the thermosetting or thermoplastic variety in which the surface layer or coating thereof contains a filler material which imparts certain desirable physical characteristics are prepared by adding a surface layer which contains a filler material in the final laminate curing step.
Inventors
- 👤 Alan D Wilks
- 👤 Karl J Youtsey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:04
CPC Classifications
B; B05; B05D; B05D5/00; B05D5/12; B05D2601/00; B05D2601/20; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/2942; Y10T428/2949
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
101 words
A POLYMERIC LAMINATE, THE SURFACE LAMINA OF WHICH COMPRISES A POLYMER CONTAINING A PARTICULATE SEMICONDUCTING MATERIAL COMPRISING AN INORGANIC REFRACTORY OXIDE HAVING A SURFACE AREA OF FROM ABOUT 1 TO ABOUT 500 SQUARE METERS PER GRAM AND A CARBONACEOUS PYROPOLYMER FORMING AT LEAST A MONOLAYER ON SAID REFRACTORY OXIDE, SAID SEMICONDUCTING MATERIAL POSSESSING A RESISTIVITY OF FROM ABOUT 0.001 OHM CENTIMETERS TO ABOUT 1010 OHM CENTIMETERS, SAID PARTICLES OF SEMICONDUCTING MATERIAL BEING LESS THAN 100 MICRONS IN SIZE AND BEING PRESENT IN SAID SURFACE LAMINA IN AN AMOUNT OF FROM ABOUT 10% TO ABOUT 50% BY WEIGHT OF SAID SURFACE LAMINA.
Claim 2
Dependent Claim
101 words
A POLYMERIC LAMINATE, THE SURFACE LAMINA OF WHICH COMPRISES A POLYMER CONTAINING A PARTICULATE SEMICONDUCTING MATERIAL COMPRISING AN INORGANIC REFRACTORY OXIDE HAVING A SURFACE AREA OF FROM ABOUT 1 TO ABOUT 500 SQUARE METERS PER GRAM AND A CARBONACEOUS PYROPOLYMER FORMING AT LEAST A MONOLAYER ON SAID REFRACTORY OXIDE, SAID SEMICONDUCTING MATERIAL POSSESSING A RESISTIVITY OF FROM ABOUT 0.001 OHM CENTIMETERS TO ABOUT 1010 OHM CENTIMETERS, SAID PARTICLES OF SEMICONDUCTING MATERIAL BEING LESS THAN 100 MICRONS IN SIZE AND BEING PRESENT IN SAID SURFACE LAMINA IN AN AMOUNT OF FROM ABOUT 10% TO ABOUT 50% BY WEIGHT OF SAID SURFACE LAMINA.
Claim 3
Dependent Claim
19 words
The composition of matter as set forth in claim 1 in which said polymeric core is an epoxy resin.
Claim 4
Dependent Claim
19 words
The composition of matter as set forth in claim 1 in which said polymeric core is a phenolic resin.
Claim 5
Dependent Claim
19 words
The composition of matter as set forth in claim 1 in which said polymeric core is a polyimide resin.
Claim 6
Dependent Claim
19 words
The composition of matter as set forth in claim 1 in which said polymeric core is a polyester resin.
Claim 7
Dependent Claim
17 words
The composition of matter as set forth in claim 1 in which said polymeric core is polypropylene.
References Cited (Backward Citations)
US3172774A
Cited
US2880120A
Cited
US2810664A
Cited
US3027278A
Cited
US3211937A
Cited
US3304199A
Cited
US3399969A
Cited
US3582445A
Cited
US3720499A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |