US3558441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a metal core printed circuit board
Assignee: International Electronic Research Corp
•
Filing: 1968-11-01
•
Granted: 1971-01-26
•
Expires: 1988-11-01
Abstract
Abstract THE INVENTION IS INVOLVED IN A METHOD FOR MAKING A METAL CORE PRINTING CIRCUIT BOARD WHICH INCLUDES APPLYING MULTIPLE LAYERS OF SYNTHETIC PLASTIC RESIN MATERIAL TO A SHEET OF METAL, THEN TREATING THE SURFACE OF THE PLASTIC MATERIAL IN SUCH A WAY AS TO PROVIDE AN ACCEPTABLE BOND, FOLLOWED BY APPLYING SUNDRY LAYERS OF DIFFERENT METALS, FIRST TO THE PLASTIC SURFACE AND THEN ONE UPON ANOTHER FOLLOWED BY THE IMPOSITION OF A CIRCUIT PATTERN, THE REMOVAL OF MATERIALS FROM AREAS INTERMEDIATE THE CIRCUIT PATTERN, AND THE APPLICATION OF AN APPROPRIATE OVERLAY OF UNLIKE METAL TO THE CIRCUIT PATTERN, THEREBY TO PROVIDE A FINISHED CIRCUIT BOARD.
Inventors
- 👤 Donald H Chadwick
- 👤 Ruben T Apodaca
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:26
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/1601; C23C18/1633; C23C18/1646; C23C18/165; C23C18/1653; C23C18/1603; C23C18/1605; H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/05; H05K1/056; H05K3/00; H05K3/10; H05K3/18; H05K3/181; H05K3/22; H05K3/38; H05K3/381; H05K3/44; H05K3/445; H05K1/0313; H05K1/0353; H05K1/0373; H05K2203/00; H05K2203/02; H05K2203/025; H05K2203/03; H05K2203/0315; H05K2203/0392; H05K2203/11; H05K2203/1105; H05K2203/1147; H05K3/02; H05K3/06; H05K3/061; H05K3/062; H05K3/108; H05K3/382; H05K3/383; H05K3/40; H05K3/42; H05K3/425; H05K3/426
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |