Patent US1254845A successfully refreshed from Google Patents.
Patent US2779258A successfully refreshed from Google Patents.
US3373022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Developer reagents, method of and means for utilizing the same
Assignee: Individual
•
Filing: 1963-09-23
•
Granted: 1968-03-12
•
Expires: 1983-09-23
Abstract
No abstract record available.
Inventors
- 👤 Johnson Clarence Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:46
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/18; G03D; G03D7/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
THE PROCESS OF DEVELOPING DIAZOTYPE REPRODUCTIONS WHICH COMPRISES EXPOSING THE SURFACE OF AN EXPOSED LIGHTSENSITIVE DIAZO SHEET TO THE VAPOR OF A DEVELOPING SOLUTION COMPRISING A MIXTURE OF AN AMMONIUM HYDROXIDE OF A BAUME DEGREE ABOVE 26 DEGREES AND METHANOL.
Claim 2
Dependent Claim
40 words
THE PROCESS OF DEVELOPING DIAZOTYPE REPRODUCTIONS WHICH COMPRISES EXPOSING THE SURFACE OF AN EXPOSED LIGHTSENSITIVE DIAZO SHEET TO THE VAPOR OF A DEVELOPING SOLUTION COMPRISING A MIXTURE OF AN AMMONIUM HYDROXIDE OF A BAUME DEGREE ABOVE 26 DEGREES AND METHANOL.
References Cited (Backward Citations)
US1244114A
Cited
US1455574A
Cited
US1980469A
Cited
US2384155A
Cited
GB650464A
Cited
US2546791A
Cited
US2761364A
Cited
US2671728A
Cited
US2825630A
Cited
US2855278A
Cited
US3147687A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-12 | 1971-09-11 | 1972-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-12 | 1975-09-11 | 1976-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-12 | 1979-09-11 | 1980-03-12 | $7700.00 | Window Closed / Lapsed |