Patent US1501786A successfully refreshed from Google Patents.
Patent US3710708A successfully refreshed from Google Patents.
US3710708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exposing and developing apparatus
Assignee: Dietzgen Corp
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Filing: 1971-02-19
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Granted: 1973-01-16
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Expires: 1991-02-19
Abstract
Abstract An apparatus wherein a photosensitive sheet material developable by contact with a gaseous developing agent is placed beneath an image bearing sheet material and the combination first exposed and then developed without separating the two sheet materials.
Inventors
- 👤 Y Koyama
- 👤 G Schuman
- 👤 R Collins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:07
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/02; G03B27/14; G03B27/30; G03B27/303; G03D; G03D7/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
Apparatus as claimed in claim 1 in which said sheet material comprises a light ray penetrable image bearing sheet material and a porous photosensitive sheet material disposed beneath said image bearing sheet whereby rays from said light source pass through said image bearing sheet material to said photosensitive sheet material and said gaseous developing agent passes through what was initially the underside of said photosensitive sheet material, said image bearing material and said photosensitive material remaining in contact with one another throughout their passage through said exposure and developing sections.
Claim 2
Dependent Claim
53 words
Apparatus as claimed in claim 1 in which said chamber in said developing section is provided with means to introduce said developing agent in the form of liquid aqueous ammonia in an area remote from said opening, and means to heat said liquid in said remote area to generate ammonia vapoRs in situ.
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) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |