US4413050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic process of producing photographic prints upon instant print film
Assignee: Individual
•
Filing: 1981-05-07
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Granted: 1983-11-01
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Expires: 2001-05-07
Abstract
Abstract A photographic process, and the product therefrom, comprising over-exposing color positive transparency film in a camera while focused upon an object to produce a latent image of the object upon the film and then developing the latent image upon the film by emersion in appropriate film development materials sequentially, with the emersion time in the first developer substantially reduced from normal to produce a low contrast actual image on the film; and thereafter, projecting and exposing the actual image on the transparency film onto an instant print film which is being maintained at a temperature at least as high as normal ambient exposure temperature prescribed for the instant print film; and then developing the instant print film according to the prescribed procedure at a temperature at least as high as normal ambient development temperature prescribed for the instant print film.
Inventors
- 👤 W. Gregory Erf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:41
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/04; G03C5/08
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
119 words
A process for making photographic color prints from a color positive transparency film of an object comprising, sequentially: a. over-exposing the color positive transparency film in a camera while focused upon the object to produce a latent image upon the film; b. developing the latent image upon the film, by immersion in developing materials sequentially, with immersion time in the first developer material reduced from effective normal to produce a low constrast actual image on the film; c. projecting and exposing the actual image which is on the transparency film onto an instant print film according to the prescribed normal effective exposure procedures, times and temperatures; and d. developing the instant print film according to the normal prescribed procedure.
Claim 2
Dependent Claim
119 words
A process for making photographic color prints from a color positive transparency film of an object comprising, sequentially: a. over-exposing the color positive transparency film in a camera while focused upon the object to produce a latent image upon the film; b. developing the latent image upon the film, by immersion in developing materials sequentially, with immersion time in the first developer material reduced from effective normal to produce a low constrast actual image on the film; c. projecting and exposing the actual image which is on the transparency film onto an instant print film according to the prescribed normal effective exposure procedures, times and temperatures; and d. developing the instant print film according to the normal prescribed procedure.
Claim 3
Dependent Claim
22 words
A process, according to claim 1, wherein the color positive transparency film is over-exposed, according to (a) about three to four F-stops.
Claim 4
Dependent Claim
29 words
A process according to claim 1, wherein the immersion time in the first development material, according to (b), is reduced about 60% to 50% from the normal effective time.
Claim 5
Dependent Claim
32 words
A process according to claim 1, wherein the temperature at which the instant print film is exposed in (c) is a temperature between about 70 degrees F. and about 120 degrees F.
Claim 6
Dependent Claim
25 words
A process according to claim 1, wherein instant print film is exposed in (c) at a temperature of between about 90 and 100 degrees F.
Claim 7
Dependent Claim
29 words
A process according to claim 4, wherein the instant print film is developed in (d) at a temperature of between about 70 degrees F. and about 120 degrees F.
Claim 8
Dependent Claim
27 words
A process according to claim 5, wherein the instant print film is developed in (d) at an elevated temperature of between about 90 and 100 degrees F.
Claim 9
Dependent Claim
41 words
A process according to claim 1, wherein the color transparency film has a normal effective ASA rating of between about 64 and 200 and the film is exposed at an ASA rating of about 6% of its normal effective ASA rating.
Claim 10
Dependent Claim
39 words
A process according to claim 1, wherein the color positive transparency film has a normal effective ASA rating of about 400 or higher and is exposed at an ASA rating of about 12% of its normal effective ASA rating.
Claim 11
Dependent Claim
37 words
A process according to claim 1, wherein color transparency film has an effective ASA rating of about 64 to 200 and the development time in the first developer is reduced about 60% from the normal effective time.
Claim 12
Dependent Claim
42 words
A process according to claim 1, wherein the color positive transparency film has a normal effective ASA rating of about 400 or higher and the time of immersion in the first developer material is reduced about 50% from the normal effective time.
Claim 13
Dependent Claim
53 words
A process according to claim 1, wherein the color positive transparency film has a normal effective ASA rating of between about 64 and about 200 and is exposed at about 6% of its normal ASA rating and the development time in the first developer is reduced about 60% from the normal effective time.
Claim 14
Dependent Claim
52 words
A process according to claim 1, wherein the color positive transparency film has a normal effective ASA rating of 400 or higher and is over-exposed at an ASA rating of about 12% of normal ASA rating and the development time in the first developer is reduced 50% from the normal effective time.
Claim 15
Dependent Claim
79 words
A process according to claim 1, wherein the color positive transparency film has a normal effective ASA rating of between 200 and 400 and is exposed at between about 6% and 12% of its normal, effective ASA rating and the development time in the first developer is reduced between about 60% and 50% of the normal effective prescribed time and the instant print film is exposed and developed at between about 70 degrees F. and about 120 degrees F.
Claim 16
Dependent Claim
17 words
A process according to claim 14 wherein the instant print film is developed for about 60 seconds.
Claim 17
Dependent Claim
57 words
A process according to claim 1, wherein the instant print film is of a type that requires exposure at an elevated temperature to develop the optimum tonal quality and color separation, and the temperature at which the instant print film is exposed in (c) is a temperature between about 90 degrees F. and about 120 degrees F.
Claim 18
Dependent Claim
59 words
A process according to claim 1, wherein the instant print film is of a type that requires development at an elevated temperature in the development process to develop the maximum and optimum tonal quality and color saturation, and the print film is developed in (d) at a temperature of between about 90 degrees F. to about 120 degrees F.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-31 | 1987-05-02 | 1987-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-31 | 1991-05-02 | 1991-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-31 | 1995-05-02 | 1995-11-01 | $7700.00 | Window Closed / Lapsed |