US4515885A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diazo vesicular imaging films with nitrate salt
Assignee: 3M Co
•
Filing: 1983-08-01
•
Granted: 1985-05-07
•
Expires: 2003-08-01
Abstract
Abstract Vesicular imaging films have good speed and stable latent images when comprised of a diazonium compound, nitrate salt, and binder comprising gelatin or poly(vinyl alcohol). The film can even have highly stable final images when the binder comprises poly(vinyl alcohol).
Inventors
- 👤 Kenneth G. Gatzke
- 👤 John M. Winslow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:23
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/60
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
73 words
A vesicular imaging film comprising a transparent or translucent substrate having on at least one surface thereof a photosensitive layer at a pH level which is not above 8.5 comprising on a weight basis of said photosensitive layer: a. 70-95% by weight of a water-soluble binder consisting essentially of poly(vinyl alcohol) b. 0.08 to 3.5% by weight of a photosensitive diazo material, and c. 4.5 to 25% by weight of a nitrate salt.
Claim 2
Dependent Claim
73 words
A vesicular imaging film comprising a transparent or translucent substrate having on at least one surface thereof a photosensitive layer at a pH level which is not above 8.5 comprising on a weight basis of said photosensitive layer: a. 70-95% by weight of a water-soluble binder consisting essentially of poly(vinyl alcohol) b. 0.08 to 3.5% by weight of a photosensitive diazo material, and c. 4.5 to 25% by weight of a nitrate salt.
Claim 3
Dependent Claim
14 words
The film of claim wherein the pH of the photosensitive layer is below 7.0.
Claim 4
Dependent Claim
15 words
The film of claim 1 having a moisture resistant transparent film over said photosensitive layer.
Claim 5
Dependent Claim
38 words
The film of claim 2 wherein the photosensitive layer comprises 75 to 90% by weight of said water-soluble binder, 0.1 to 3% by weight of said diazo material, and 6 to 20% by weight of said nitrate salt.
Claim 6
Dependent Claim
14 words
The film of claim 1 wherein said diazo material is a photosensitive diazo salt.
Claim 7
Dependent Claim
14 words
The film of claim 4 wherein said diazo material is a photosensitive diazo salt.
Claim 8
Dependent Claim
38 words
The film of claim 1 wherein the photosensitive layer comprises 75 to 90% by weight of said water-soluble binder, 0.1 to 3% by weight of said diazo material, and 6 to 20% by weight of said nitrate salt.
Claim 9
Dependent Claim
14 words
The film of claim 7 wherein said diazo material is a photosensitive diazo salt.
Claim 10
Dependent Claim
38 words
The film of claim 2 wherein the photosensitive layer comprises 75 to 90% by weight of said water-soluble binder, 0.1 to 3% by weight of said diazo material, and 6 to 20% by weight of said nitrate salt.
Claim 11
Dependent Claim
14 words
The film of claim 9 wherein said diazo material is a photosensitive diazo salt.
Claim 12
Dependent Claim
38 words
The film of claim 1 wherein the photosensitive layer comprises 80 to 90% by weight of said water-soluble binder, 0.25 to 2.5% by weight of said diazo material and 8 to 15% by weight of said nitrate salt.
Claim 13
Dependent Claim
14 words
The film of claim 11 wherein said diazo material comprises a photosensitive diazo salt.
Claim 14
Dependent Claim
14 words
The film of claim 1 wherein said nitrate salt is a metal nitrate salt.
Claim 15
Dependent Claim
14 words
The film of claim 4 wherein said nitrate salt is a metal nitrate salt.
Claim 16
Dependent Claim
14 words
The film of claim 7 wherein said nitrate salt is a metal nitrate salt.
Claim 17
Dependent Claim
15 words
The film of claim 8 wherein said nitrate salt is a hydrated metal nitrate salt.
Claim 18
Dependent Claim
15 words
The film of claim 11 wherein said nitrate salt is a hydrated metal nitrate salt.
Claim 19
Dependent Claim
15 words
The film of claim 12 wherein said nitrate salt is a hydrated metal nitrate salt.
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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) | 1988-05-06 | 1988-11-05 | 1989-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-06 | 1992-11-05 | 1993-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-06 | 1996-11-05 | 1997-05-07 | $7700.00 | Window Closed / Lapsed |