US2873207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diazotype reproduction material and method
Assignee: Eugene Dietzgen Co
•
Filing: 1955-02-21
•
Granted: 1959-02-10
•
Expires: 1975-02-21
Abstract
No abstract record available.
Inventors
- 👤 Ralph P Weegar
- 👤 Henry C Unkauf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:45
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/52; Y; Y10; Y10S; Y10S430/00; Y10S430/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1997745A
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US2433515A
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US2718476A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-09 | 1962-08-11 | 1963-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-09 | 1966-08-11 | 1967-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-09 | 1970-08-11 | 1971-02-10 | $7700.00 | Window Closed / Lapsed |