Patent US2820760A successfully refreshed from Google Patents.
US2820760A
Expired / Lapsed
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Fluid compositions for use in spirit duplication
Assignee: AB Dick Co
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Filing: 1952-08-13
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Granted: 1958-01-21
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Expires: 1972-08-13
Abstract
No abstract record available.
Inventors
- 👤 Robert J Klimkowski
- 👤 Robert T Florence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:03
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/025; B41M5/0253
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A COMPOSITION FOR APPLICATION TO COPY SHEETS IN A SPIRIT DUPLICATING PROCESS TO PRODUCE COPY WITH DIAZO AND COUPLER EXTRACTED FROM THE IMAGED PORTION OF A DUPLICATING MASTER, THE FLUID COMPOSITION CONSISTING ESSENTIALLY OF 4-10 PERCENT BY WEIGHT OF AN AMINE BASE SOLUBLE IN ALCOHOL AND WATER, 80-90 PERCENT BY WEIGHT ALCOHOL SELECTED FROM THE GROUP CONSISTING OF ETHANOL AND METHANOL AND UP TO 10 PERCENT BY WEIGHT WATER.
Claim 2
Dependent Claim
69 words
A COMPOSITION FOR APPLICATION TO COPY SHEETS IN A SPIRIT DUPLICATING PROCESS TO PRODUCE COPY WITH DIAZO AND COUPLER EXTRACTED FROM THE IMAGED PORTION OF A DUPLICATING MASTER, THE FLUID COMPOSITION CONSISTING ESSENTIALLY OF 4-10 PERCENT BY WEIGHT OF AN AMINE BASE SOLUBLE IN ALCOHOL AND WATER, 80-90 PERCENT BY WEIGHT ALCOHOL SELECTED FROM THE GROUP CONSISTING OF ETHANOL AND METHANOL AND UP TO 10 PERCENT BY WEIGHT WATER.
References Cited (Backward Citations)
US2352604A
Cited
US2450959A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-20 | 1961-07-22 | 1962-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-20 | 1965-07-22 | 1966-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-20 | 1969-07-22 | 1970-01-21 | $7700.00 | Window Closed / Lapsed |