US3741764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making accurate reproduction
Assignee: Jerobee Industries Inc
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Filing: 1971-05-21
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Granted: 1973-06-26
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Expires: 1991-05-21
Abstract
Abstract A METHOD OF MAKING AN ACCURATE REPRODUCTION OF A DIE HAVING RAISED DIE ELEMENTS AND ADJACENT RECESS AREAS. THE DIE IS IMMERSED IN A PHOTOGRAPHIC DEVELOPING SOLUTION, WITH THE DIE FACE BEING DISPOSED UPWARDLY. A FULLY EXPOSED PHOTOGRAPHIC FILM IS PALCED INTO THE DEVELOPING SOLUTION AND PRESSED AGAINST THE DIE FACE SO THAT THE DEVELOPING SOLUTION IS EXCLUDED FROM THOSE AREAS OF THE FILM THAT PRESSED AGAINST THE DIE ELEMENTS. THE FILM IS THEN REMOVED FROM THE DEVELOPING SOLUTION, IMMEDIATELT RINSED IN WATERR TO REMOVE THE DEVELOPING SOLUTION, AND THEN PLACED IN A FIX SOLUTION TO PRODUCE A NEGATIVE THAT IS AN ACCURATE REPRODUCTION OF THE RAISED DIE ELEMENTS.
Inventors
- 👤 W Weglin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:44
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/0002; B; B41; B41M; B41M5/00; B41M5/025; B82; B82Y; B82Y10/00; B82Y40/00; G03C; G03C11/00; G03C11/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |