Patent US2067489A successfully refreshed from Google Patents.
US2067489A
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US
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Photoelectric engraving
Assignee: HOWEY
•
Filing: 1931-11-04
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Granted: 1937-01-12
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Expires: 1951-11-04
Abstract
No abstract record available.
Inventors
- 👤 Howey Walter Crawford
- 👤 Woodward Benjamin Weston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:45
CPC Classifications
B; B41; B41C; B41C1/00; B41C1/02; B41C1/04; Y; Y10; Y10S; Y10S409/00; Y10S409/901; Y10T; Y10T409/00; Y10T409/30; Y10T409/30084; Y10T409/301176; Y10T409/301624; Y10T409/30168; Y10T409/30224; Y10T409/303416; Y10T409/303472; Y10T409/303528; Y10T409/303584; Y10T409/304312; Y10T409/50; Y10T409/500164; Y10T409/500328; Y10T409/500492; Y10T83/00; Y10T83/162; Y10T83/166
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) | 1940-01-12 | 1940-07-13 | 1941-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-01-12 | 1944-07-13 | 1945-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-01-12 | 1948-07-13 | 1949-01-12 | $7700.00 | Window Closed / Lapsed |