US5203913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Erasable aqueous ink composition
Assignee: Sakura Color Products Corp
•
Filing: 1991-10-11
•
Granted: 1993-04-20
•
Expires: 2011-10-11
Abstract
Abstract The invention provides an erasable aqueous ink composition comprising, based on the total weight of the ink composition, 3 to 50% of a resin having a minimum film-forming temperature of not lower than 40 DEG C., 0.01 to 10% of a water-insoluble dye, 0.5 to 50% of a water-soluble organic solvent and 20 to 60% of water.
Inventors
- 👤 Hiroyoshi Yamamoto
- 👤 Shingo Uzukawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:00
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/16
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
53 words
An erasable aqueous ink composition comprising, based on the total weight of the ink composition, 3 to 50% of a resin having a minimum film-forming temperature of not lower than 40° C., 0.01 to 10% of a water-insoluble dyes, 0.5 to 50% of a water-soluble organic solvent and 20 to 60% of water.
Claim 2
Dependent Claim
53 words
An erasable aqueous ink composition comprising, based on the total weight of the ink composition, 3 to 50% of a resin having a minimum film-forming temperature of not lower than 40° C., 0.01 to 10% of a water-insoluble dyes, 0.5 to 50% of a water-soluble organic solvent and 20 to 60% of water.
Claim 3
Dependent Claim
40 words
An aqueous erasable ink composition according to claim 1 wherein the resin is at least one member selected from the group consisting of acrylic resins, acryl-styrene copolymer resins, ethylene-vinyl acetate-vinyl chloride copolymer resins acryl-vinyl acetate copolymer resins and styrene resins.
Claim 4
Dependent Claim
23 words
An aqueous erasable ink composition according to claim 1 wherein the resin has a minimum film-forming temperature of not lower than 50° C.
Claim 5
Dependent Claim
58 words
An aqueous erasable ink composition according to claim 1 which comprises, based on the total weight of the ink composition, 20 to 45% of a resin having a minimum film-forming temperature of not less than 40° C., 0.01 to 10% of a water-soluble dye, 5 to 30% of a water-soluble organic solvent and 20 to 60% of water.
References Cited (Backward Citations)
US3912520A
Cited
US3922457A
Cited
US4097289A
Cited
US4256492A
Cited
JPS5730772A
Cited
US4557618A
Cited
US4578117A
Cited
JPS6155176A
Cited
JPS61200180A
Cited
US4740549A
Cited
US4940628A
Cited
US4988123A
Cited
US4954174A
Cited
JPH0238474A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-04-19 | 1996-10-19 | 1997-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-19 | 2000-10-19 | 2001-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-04-19 | 2004-10-19 | 2005-04-20 | $7700.00 | Window Closed / Lapsed |