US3475242A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for controlling metal etching operation
Assignee: FMC Corp
•
Filing: 1966-12-19
•
Granted: 1969-10-28
•
Expires: 1986-12-19
Abstract
No abstract record available.
Inventors
- 👤 Kenneth J Radimer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:52
CPC Classifications
C; C23; C23F; C23F1/00; C23F1/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2762036A
Cited
US2978301A
Cited
US3032753A
Cited
US2933094A
Cited
US3013569A
Cited
US3300362A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-27 | 1973-04-28 | 1973-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-27 | 1977-04-28 | 1977-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-27 | 1981-04-28 | 1981-10-28 | $7700.00 | Window Closed / Lapsed |