Patent US2690968A successfully refreshed from Google Patents.
US2690968A
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Development of diazo and azide sensitized colloids
Assignee: Konica Minolta Graphic Imaging USA Inc
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Filing: 1952-10-04
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Granted: 1954-10-05
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Expires: 1972-10-04
Abstract
No abstract record available.
Inventors
- 👤 Jr Augustin J Powers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:43
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/26; G03F7/38; G03F7/004; G03F7/008
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
IN THE PROCESS OF DEVELOPING AN EXPOSED SHEET OF COLLOIDAL MATERIAL CAPABLE OF BEING TANNED AND SENSITIZED WITH A COMPOUND CONTAINING THE -N:N- GROUP WHICH COMPOUND IS DECOMPOSED ON EXPOSURE TO LIGHT TO TAN THE COLLOIDAL MATERIAL AND TO RELEASE GASEOUS NITROGEN, SAID DEVELOPING BEING DONE BY WASHING WITH WATER, THE IMPROVEMENT COMPRISING THE STEP OF SUBJECTING THE EXPOSED SHEET TO SUCTION PRIOR TO THE WASHING OF THE SHEET WITH WATER, SAID SUCTION BEING OF SUCH DEGREE AND DURATION AS TO REMOVE THE GASEOUS NITROGEN FROM THE COLLOIDAL MATERIAL OF THE SHEET.
Claim 2
Dependent Claim
92 words
IN THE PROCESS OF DEVELOPING AN EXPOSED SHEET OF COLLOIDAL MATERIAL CAPABLE OF BEING TANNED AND SENSITIZED WITH A COMPOUND CONTAINING THE -N:N- GROUP WHICH COMPOUND IS DECOMPOSED ON EXPOSURE TO LIGHT TO TAN THE COLLOIDAL MATERIAL AND TO RELEASE GASEOUS NITROGEN, SAID DEVELOPING BEING DONE BY WASHING WITH WATER, THE IMPROVEMENT COMPRISING THE STEP OF SUBJECTING THE EXPOSED SHEET TO SUCTION PRIOR TO THE WASHING OF THE SHEET WITH WATER, SAID SUCTION BEING OF SUCH DEGREE AND DURATION AS TO REMOVE THE GASEOUS NITROGEN FROM THE COLLOIDAL MATERIAL OF THE SHEET.
References Cited (Backward Citations)
US2100063A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-10-04 | 1958-04-05 | 1958-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-04 | 1962-04-05 | 1962-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-04 | 1966-04-05 | 1966-10-05 | $7700.00 | Window Closed / Lapsed |