US2566709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diazotype photoprinting materials containing colloidal silica
Assignee: GAF Chemicals Corp
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Filing: 1947-10-30
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Granted: 1951-09-04
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Expires: 1967-10-30
Abstract
No abstract record available.
Inventors
- 👤 Glahn William H Von
- 👤 Lester N Stanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:24
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/52; G03C1/61
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
31 words
DIAZOTYPE PHOTOPRINTING MATERIAL HAVING A LIGHT SENSITIVE LAYER COMPRISING COLLOIDAL SILICA, AND A LIGHT SENSITIVE DIAZO COMPOUND, SAID COLLOIDAL SILICA AND SAID LIGHT-SENSITIVE DIAZO COMPOUND BEING INTERMINGLED IN THE SAME LAYER.
Claim 2
Dependent Claim
31 words
DIAZOTYPE PHOTOPRINTING MATERIAL HAVING A LIGHT SENSITIVE LAYER COMPRISING COLLOIDAL SILICA, AND A LIGHT SENSITIVE DIAZO COMPOUND, SAID COLLOIDAL SILICA AND SAID LIGHT-SENSITIVE DIAZO COMPOUND BEING INTERMINGLED IN THE SAME LAYER.
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) | 1954-09-03 | 1955-03-05 | 1955-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-03 | 1959-03-05 | 1959-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-03 | 1963-03-05 | 1963-09-04 | $7700.00 | Window Closed / Lapsed |