US2771372A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stencil duplicating inks
Assignee: AB Dick Co
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Filing: 1952-03-27
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Granted: 1956-11-20
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Expires: 1972-03-27
Abstract
No abstract record available.
Inventors
- 👤 Chambers Thomas Seal
- 👤 Florence Robert Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:42
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/02; C09D11/10; C09D11/102
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A STENCIL DUPLICATING INK CONSISTING ESSENTIALLY OF WATER AS DILUENT, A TINCTORIAL AGENT PRESENT IN SUFFICIENT QUANTITY TO IMPART LEGIBLILTY TO THE COPY, A WATER SOLUBLE ALKYLENE GLYCOL POLYMER PRESENT IN AN AMOUNT WITHIN THE RANGE OF 30-60 PERCENT BY WEIGHT HAVING A MOLECULAR WEIGHT GREATER THAN 1000 SELECTED FROM THE GROUP CONSISTING OF A POLYETHYLENE GLYCOL AND A POLYPROPYLENE GLYCOL FOR BODYING THE INK COMPOSITION AND TO PROVIDE AN ADHERENT BASE UPON DRYING, AND A LIQUID POLYHYDRIC ALCOHOL PRESENT IN AN AMOUNT UP TO 40 PERCENT BY WEIGHT.
Claim 2
Dependent Claim
89 words
A STENCIL DUPLICATING INK CONSISTING ESSENTIALLY OF WATER AS DILUENT, A TINCTORIAL AGENT PRESENT IN SUFFICIENT QUANTITY TO IMPART LEGIBLILTY TO THE COPY, A WATER SOLUBLE ALKYLENE GLYCOL POLYMER PRESENT IN AN AMOUNT WITHIN THE RANGE OF 30-60 PERCENT BY WEIGHT HAVING A MOLECULAR WEIGHT GREATER THAN 1000 SELECTED FROM THE GROUP CONSISTING OF A POLYETHYLENE GLYCOL AND A POLYPROPYLENE GLYCOL FOR BODYING THE INK COMPOSITION AND TO PROVIDE AN ADHERENT BASE UPON DRYING, AND A LIQUID POLYHYDRIC ALCOHOL PRESENT IN AN AMOUNT UP TO 40 PERCENT BY WEIGHT.
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) | 1959-11-20 | 1960-05-21 | 1960-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-20 | 1964-05-21 | 1964-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-20 | 1968-05-21 | 1968-11-20 | $7700.00 | Window Closed / Lapsed |