US3698940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making additive printed circuit boards and product thereof
Assignee: MacDermid Inc
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Filing: 1970-01-26
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Granted: 1972-10-17
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Expires: 1990-01-26
Abstract
Abstract A METHOD IS DISCLOSED FOR FORMING PRINTED CIRCUIT BOARDS BY THE ADDITIVE PROCESS, IN WHICH THE SURFACE OF THE SUBSTRATE IS CONTACTED WITH A PARTICULAR CLASS OF SOLVENTS, PRIOR TO ELECTROLESS DEPOSITION OF THE METAL THEREON, AND AT ONE OR MORE POINTS IN THE PROCESS THE BOARD IS HEATED OR BAKED.
Inventors
- 👤 Mark Mersereau
- 👤 Harold L Rhodenizer
- 👤 John J Grunwald
- 👤 William P Innes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:59
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/1601; C23C18/1633; C23C18/1646; C23C18/165; C23C18/1653; C23C18/1603; C23C18/1605; C23C18/18; C23C18/20; C23C18/2006; C23C18/2046; C23C18/2073; C23C18/2086; H; H05; H05K; H05K3/00; H05K3/38; H05K3/381; H05K2201/00; H05K2201/03; H05K2201/0332; H05K2201/0335; H05K2201/0344; H05K2203/00; H05K2203/07; H05K2203/0779; H05K2203/0783; H05K2203/11; H05K2203/1105; H05K3/02; H05K3/06; H05K3/061; H05K3/062; H05K3/10; H05K3/108; H05K3/18; H05K3/181; Y; Y10; Y10S; Y10S428/00; Y10S428/901; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24917
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |