US3318699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and material for the development of diazotype copies
Assignee: Keuffel and Esser Co
•
Filing: 1964-10-09
•
Granted: 1967-05-09
•
Expires: 1984-10-09
Abstract
No abstract record available.
Inventors
- 👤 Lind Erwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:36
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A METHOD OF DEVELOPING EXPOSED DIAZOTYPE SHEET MATERIAL COMPRISING: (A) PROVIDING A DEVELOPER SHEET COMPRISING A SUPPORT, INFRARED RADIATION-ABSORBING, HEAT-GENERATING MATERIAL UNIFORMLY DISPOSED AT A SURFACE OF SAID SUPPORT, AND A THERMALLY-ACTIVATABLE ALKALI-GENERATOR UNIFORMLY DISPOSED IN INTIMATE PHYSICAL CONTACT WITH SAID RADIATION-ABSORBING MATERIAL T SAID SUPPORT SURFACE; (B) COMBINING SAID SUPPORT SURFACE IN INTIMATE CONTACT WITH THE SENSITIZED SURFACE OF SAID DIAZOTYPE SHEET MATERIAL; AND (C) EXPOSING SAID RADIATION-ABSORBING MATERIAL TO INFRARED RADIATION FOR A TIME SUFFICIENT TO GENERATE THEREIN TEMPEATURES EFFECTIVE TO ACTIVATE SAID ALKALI GENERATOR.
Claim 2
Independent Claim
87 words
A METHOD OF DEVELOPING EXPOSED DIAZOTYPE SHEET MATERIAL COMPRISING: (A) PROVIDING A DEVELOPER SHEET COMPRISING A SUPPORT, INFRARED RADIATION-ABSORBING, HEAT-GENERATING MATERIAL UNIFORMLY DISPOSED AT A SURFACE OF SAID SUPPORT, AND A THERMALLY-ACTIVATABLE ALKALI-GENERATOR UNIFORMLY DISPOSED IN INTIMATE PHYSICAL CONTACT WITH SAID RADIATION-ABSORBING MATERIAL T SAID SUPPORT SURFACE; (B) COMBINING SAID SUPPORT SURFACE IN INTIMATE CONTACT WITH THE SENSITIZED SURFACE OF SAID DIAZOTYPE SHEET MATERIAL; AND (C) EXPOSING SAID RADIATION-ABSORBING MATERIAL TO INFRARED RADIATION FOR A TIME SUFFICIENT TO GENERATE THEREIN TEMPEATURES EFFECTIVE TO ACTIVATE SAID ALKALI GENERATOR.
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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) | 1970-05-08 | 1970-11-07 | 1971-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-08 | 1974-11-07 | 1975-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-08 | 1978-11-07 | 1979-05-09 | $7700.00 | Window Closed / Lapsed |