US3730799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for metallic pattern definition
Assignee: Collins Radio Co
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Filing: 1971-07-07
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Granted: 1973-05-01
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Expires: 1991-07-07
Abstract
Abstract A METALLIC PATTERN DEFINITION SYSTEM WITH IMPROVED TOLERANCES WHEREIN A PLATED SUBSTRATE IS EMERSED IN AN ETCHANT SOLUTION AND A VORTEX IS ESTABLISHED IN SAID SOLUTION CENTERED GENERALLY OVER SAID SUBSTRATE. A ROTATABLE SUBSTRATE HOLDER WITH MAGNETIC INDUCTION MEANS MAY BE EMPLOYED IN ESTABLISHING SAID VORTEX.
Inventors
- 👤 J Scannell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:06
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/02; H05K3/06; H05K3/068; C; C23; C23F; C23F1/00; C23F1/02
Claims Analysis
Total Claims: 0
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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) | 1976-04-30 | 1976-10-30 | 1977-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-30 | 1980-10-30 | 1981-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-30 | 1984-10-30 | 1985-05-01 | $7700.00 | Window Closed / Lapsed |