Patent US2221096A successfully refreshed from Google Patents.
Patent US3499218A successfully refreshed from Google Patents.
US3499218A
Expired / Lapsed
US
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Multilayer circuit boards and methods of making the same
Assignee: Electro Mechanisms Inc
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Filing: 1966-10-31
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Granted: 1970-03-10
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Expires: 1986-10-31
Abstract
No abstract record available.
Inventors
- 👤 Victor F Dahlgren
- 👤 Sidney K Tally
- 👤 Thomas H Stearns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:56
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/30; H05K3/32; H05K3/34; H05K3/341; H05K3/3421; H05K3/3426; H05K3/22; H05K3/28; H05K3/328; H05K2201/00; H05K2201/10; H05K2201/10613; H05K2201/10621; H05K2201/10628; H05K2201/10742; H05K2201/10886; H05K2201/10946; H05K2203/00; H05K2203/02; H05K2203/0264; H05K2203/05; H05K2203/0562; H05K2203/0582; H05K3/281; H05K3/346; H05K3/40; H05K3/4007; H05K3/4015; Y; Y02; Y02P; Y02P70/00; Y02P70/50; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49101; Y10T29/49117; Y10T29/49124; Y10T29/49155
Claims Analysis
Total Claims: 0
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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) | 1973-03-09 | 1973-09-08 | 1974-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-09 | 1977-09-08 | 1978-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-09 | 1981-09-08 | 1982-03-10 | $7700.00 | Window Closed / Lapsed |