Patent US2228762A successfully refreshed from Google Patents.
US2228762A
Expired / Lapsed
US
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Process for the production of photographs of luminous images and particularly of X-ray cinematographic images and developing solutions therefor
Assignee: Individual
•
Filing: 1938-07-09
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Granted: 1941-01-14
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Expires: 1958-07-09
Abstract
No abstract record available.
Inventors
- 👤 Hafstein Franz
- 👤 Borst Helmut
- 👤 Forstmann Walther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:49
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/29; G03C5/30; G03C5/16; Y; Y10; Y10S; Y10S430/00; Y10S430/135; Y10S430/167
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) | 1944-01-14 | 1944-07-15 | 1945-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-01-14 | 1948-07-15 | 1949-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-01-14 | 1952-07-15 | 1953-01-14 | $7700.00 | Window Closed / Lapsed |