US3218165A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing continuoustone transparencies
Assignee: LAWRENCE DAVID MACKENZIE
•
Filing: 1962-05-16
•
Granted: 1965-11-16
•
Expires: 1982-05-16
Abstract
No abstract record available.
Inventors
- 👤 Foote Harold Francis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:52
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/29
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
A PROCESS FOR PRODUCING CONTINUOUS-TONE IMAGES ON HIGH-CONTRAST PHOTOGRAPHIC LINE FILM, THAT COMPRISES, THE SUCCESSIVE STEPS OF EXPOSING SUCH HIGH-CONTRAST LINE FILM; BRIEFLY SUBMERSING THE FILM IN A FAST-ACTING DEVELOPER TO WHICH WATER HAS BEEN ADDED SELECTED FROM THE GROUP CONSISTING SUBSTANTIALLY OF:
Claim 2
Dependent Claim
43 words
A PROCESS FOR PRODUCING CONTINUOUS-TONE IMAGES ON HIGH-CONTRAST PHOTOGRAPHIC LINE FILM, THAT COMPRISES, THE SUCCESSIVE STEPS OF EXPOSING SUCH HIGH-CONTRAST LINE FILM; BRIEFLY SUBMERSING THE FILM IN A FAST-ACTING DEVELOPER TO WHICH WATER HAS BEEN ADDED SELECTED FROM THE GROUP CONSISTING SUBSTANTIALLY OF:
References Cited (Backward Citations)
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US1928579A
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US2028863A
Cited
US2339482A
Cited
US2541490A
Cited
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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) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |