US2822635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for etching metal webs
Assignee: Individual
•
Filing: 1954-10-01
•
Granted: 1958-02-11
•
Expires: 1974-10-01
Abstract
No abstract record available.
Inventors
- 👤 Norman B Mears
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:52
CPC Classifications
C; C23; C23F; C23F1/00; C23F1/08; G; G03; G03F; G03F7/00; G03F7/26; G03F7/30; G03F7/3085; H; H01; H01J; H01J9/00; H01J9/02; H01J9/14; H01J9/142
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2733999A
Cited
US721445A
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US979071A
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US1207774A
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US2141020A
Cited
US2261988A
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US2321982A
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US2570299A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-10 | 1961-08-12 | 1962-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-10 | 1965-08-12 | 1966-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-10 | 1969-08-12 | 1970-02-11 | $7700.00 | Window Closed / Lapsed |