Patent US2498129A successfully refreshed from Google Patents.
US2498129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical etching device
Assignee: Individual
•
Filing: 1945-11-28
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Granted: 1950-02-21
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Expires: 1965-11-28
Abstract
No abstract record available.
Inventors
- 👤 Allen R Lindsay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:49
CPC Classifications
C; C25; C25F; C25F7/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US80402A
Cited
US2061591A
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US823814A
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US1365883A
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US1545942A
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US1787431A
Cited
CH130909A
Cited
US2267901A
Cited
GB472278A
Cited
GB483503A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-20 | 1953-08-22 | 1954-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-20 | 1957-08-22 | 1958-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-20 | 1961-08-22 | 1962-02-21 | $7700.00 | Window Closed / Lapsed |