Patent US3067034A successfully refreshed from Google Patents.
US3067034A
Expired / Lapsed
US
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Photographic method for producing silhouette images
Assignee: Individual
•
Filing: 1957-01-22
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Granted: 1962-12-04
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Expires: 1977-01-22
Abstract
No abstract record available.
Inventors
- 👤 Clifford P Chapman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:34
CPC Classifications
G; G03; G03F; G03F3/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA535436A
Cited
US992898A
Cited
US1430347A
Cited
US1679942A
Cited
US2061230A
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US2073313A
Cited
US2158194A
Cited
US2182814A
Cited
US2215128A
Cited
US2371773A
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US2494053A
Cited
US2459129A
Cited
US2446915A
Cited
US2500052A
Cited
US2694634A
Cited
US2666008A
Cited
US2943936A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-03 | 1966-06-04 | 1966-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-03 | 1970-06-04 | 1970-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-03 | 1974-06-04 | 1974-12-04 | $7700.00 | Window Closed / Lapsed |