Patent US3494815A successfully refreshed from Google Patents.
US3494815A
Expired / Lapsed
US
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Apparatus for etching a printing plate
Assignee: Individual
•
Filing: 1966-07-22
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Granted: 1970-02-10
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Expires: 1986-07-22
Abstract
No abstract record available.
Inventors
- 👤 Tomiya Yoshimatsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:31
CPC Classifications
C; C23; C23F; C23F1/00; C23F1/08; B; B41; B41C; B41C1/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1137339A
Cited
US1267754A
Cited
US3121037A
Cited
GB883993A
Cited
US3232814A
Cited
US3327721A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-09 | 1973-08-11 | 1974-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-09 | 1977-08-11 | 1978-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-09 | 1981-08-11 | 1982-02-10 | $7700.00 | Window Closed / Lapsed |