US4758276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stearic acid-containing ink jet inks
Assignee: Ricoh Printing Systems America Inc
•
Filing: 1986-09-16
•
Granted: 1988-07-19
•
Expires: 2006-09-16
Abstract
Abstract A stearic acid-containing ink jet ink for use in an ink jet apparatus which features good print quality. The ink jet ink is discharged from the ink jet ink apparatus at elevated temperatures above ambient.
Inventors
- 👤 An-Chun R. Lin
- 👤 Richard G. Whitfield
- 👤 Theodore M. Cooke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:51
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/34
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
56 words
A method of impulse ink jet printing comprising the step of jetting a non-aqueous ink jet ink composition, said ink being selected to contain at least stearic acid in an approximate weight percentage range from 50.0 to 99.0, said composition being discharged from an ink jet apparatus as a liquid at an elevated temperature above ambient.
Claim 2
Independent Claim
56 words
A method of impulse ink jet printing comprising the step of jetting a non-aqueous ink jet ink composition, said ink being selected to contain at least stearic acid in an approximate weight percentage range from 50.0 to 99.0, said composition being discharged from an ink jet apparatus as a liquid at an elevated temperature above ambient.
Claim 3
Dependent Claim
18 words
The impulse ink jet printing method of claim 1, when said ink is selected to comprise oleic acid.
Claim 4
Dependent Claim
20 words
The impulse ink jet printing method of claim 1, wherein said ink is selected to comprise a mixture of waxes.
Claim 5
Dependent Claim
25 words
The impulse ink jet printing method of claim 1, wherein said ink is selected to comprise a natural wax in combination with said stearic acid.
Claim 6
Dependent Claim
22 words
The impulse ink jet printing method of claim 1, wherein said ink is selected to comprise a chemically modified or compounded wax.
Claim 7
Dependent Claim
29 words
The impulse ink jet printing method of claim 4, wherein said natural wax is selected from a group of waxes consisting of: Japan wax, candelilla wax, and carnauba wax.
Claim 8
Dependent Claim
23 words
The impulse ink jet printing method of claim 1, wherein said ink is selected to comprise at least one dye or coloring agent.
Claim 9
Independent Claim
59 words
A method of impulse ink jet printing comprising the jetting of a non-aqueous ink jet ink composition comprising stearic acid as a major component thereof, said composition being discharged from an ink jet apparatus as a liquid at an elevated temperature above ambient to form, when permitted to solidify, dot sizes having an average circularity of at least 0.7.
Claim 10
Independent Claim
59 words
A method of impulse ink jet printing comprising the jetting of a non-aqueous ink jet ink composition comprising stearic acid as a major component thereof, said composition being discharged from an ink jet apparatus as a liquid at an elevated temperature above ambient to form, when permitted to solidify, dot sizes having an average circularity of at least 0.7.
Claim 11
Independent Claim
46 words
A method of impulse ink jet printing comprising the jetting of an ink jet ink composition comprising stearic acid as a major component thereof, said composition having a maximum viscosity of 35 centipoises at a temperature in an approximate range of 40° C. to 90° C.
Claim 12
Independent Claim
46 words
A method of impulse ink jet printing comprising the jetting of an ink jet ink composition comprising stearic acid as a major component thereof, said composition having a maximum viscosity of 35 centipoises at a temperature in an approximate range of 40° C. to 90° C.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-07-19 | 1992-01-18 | 1992-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-19 | 1996-01-18 | 1996-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-19 | 2000-01-18 | 2000-07-19 | $7700.00 | Window Closed / Lapsed |