Patent US3401068A successfully refreshed from Google Patents.
US3401068A
Expired / Lapsed
US
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Method and apparatus for uniformly etching printed circuits by control of the conveyor speed
Assignee: Chemcut Corp
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Filing: 1965-02-15
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Granted: 1968-09-10
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Expires: 1985-02-15
Abstract
No abstract record available.
Inventors
- 👤 Robert C Benton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:40
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/02; H05K3/06; H05K3/068; C; C23; C23F; C23F1/00; C23F1/08; G; G01; G01N; G01N1/00; G01N1/28; G01N1/32; H02; H02P; H02P5/00; H02P5/46
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) | 1971-09-10 | 1972-03-11 | 1972-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-10 | 1976-03-11 | 1976-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-10 | 1980-03-11 | 1980-09-10 | $7700.00 | Window Closed / Lapsed |