US3791909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of laminating polyimide film
Assignee: CIRCUIT MATERIALS DIVISION DOD
•
Filing: 1972-01-12
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Granted: 1974-02-12
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Expires: 1992-01-12
Abstract
Abstract A process of laminating a polyimide film and a film of a completely fluorinated ethylene-propylene copolymer, the later film having one surface rendered cementable, by bringing together one surface of said polyimide film and said cementable surface of said fluorinated ethylene-propylene film under pressure and with the application of heat.
Inventors
- 👤 I Mckee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:25
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/28; B32B27/281; B32B27/32; B32B27/322; H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/0353; H05K1/036; B32B2309/00; B32B2309/02; B32B2309/022; B32B2379/00; B32B2379/08; B32B2457/00; B32B2457/08; H05K1/0393; H05K2201/00; H05K2201/01; H05K2201/0137; H05K2201/015; H05K2201/0154; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154; Y10T428/31721
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
26 words
The process of claim 1 in which said films are brought together under a pressure in the range of 2 - 8 pounds per square inch.
Claim 2
Dependent Claim
18 words
The process of claim 1 in which said films are brought together at a temperature of approximately 150*C.
Claim 3
Dependent Claim
60 words
The process of claim 1 in which said films are brought together by moving the films, while in contact with each other, between rollers, at least one of which is heated, which rollers exert said pressure against the films, and the films are moved between the rollers at a speed in the range of 1/2 to 20 feet per minute.
Claim 4
Dependent Claim
27 words
The process of claim 4 in which said films are moved between said rollers at a speed in the range of 4 to 6 feet per minute.
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) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |