Patent US2820710A successfully refreshed from Google Patents.
US2820710A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Printing inks
Assignee: Fredk H Levey Co Inc
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Filing: 1953-12-01
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Granted: 1958-01-21
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Expires: 1973-12-01
Abstract
No abstract record available.
Inventors
- 👤 Geoffrey R Buckwalter
- 👤 John P Costello
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:17
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/02; C09D11/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A PRINTING INK COMPRISING A COLORING MATERIAL DISPERSED IN A VEHICLE CONSISTING ESSENTIALLY OF NITROCELLULOSE OF THE ALCOHOL-SOLUBLE TYPE CONTAINING NOT MORE THAN 11.7% NITROGEN, DISSOLVED IN AN ALKANEDIOL FROM THE GROUP CONSISTING OF 1,2-PROPANEDIOL, 2-METHYL-1,2-PROPANEDIOL, 1,5-PENTANDIOL, 2-ETHYL-1,3-HEXANDIOL, 2-METHYL-2,4-PENTANDIOL AND 2,3-BUTYLENE GLYCOL, THE PROPORTION OF NITROCELLULOSE BEING WITHIN THE RANGE OF FROM ABOUT 2% TO 25%, BASED ON THE WEIGHT OF THE INK.
Claim 2
Dependent Claim
63 words
A PRINTING INK COMPRISING A COLORING MATERIAL DISPERSED IN A VEHICLE CONSISTING ESSENTIALLY OF NITROCELLULOSE OF THE ALCOHOL-SOLUBLE TYPE CONTAINING NOT MORE THAN 11.7% NITROGEN, DISSOLVED IN AN ALKANEDIOL FROM THE GROUP CONSISTING OF 1,2-PROPANEDIOL, 2-METHYL-1,2-PROPANEDIOL, 1,5-PENTANDIOL, 2-ETHYL-1,3-HEXANDIOL, 2-METHYL-2,4-PENTANDIOL AND 2,3-BUTYLENE GLYCOL, THE PROPORTION OF NITROCELLULOSE BEING WITHIN THE RANGE OF FROM ABOUT 2% TO 25%, BASED ON THE WEIGHT OF THE INK.
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) | 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 |