Patent US4657697A successfully refreshed from Google Patents.
US4657697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of fluorescent thermal transfer sheet by monomer polymerization method
Assignee: Pitney Bowes Inc
•
Filing: 1986-01-15
•
Granted: 1987-04-14
•
Expires: 2006-01-15
Abstract
Abstract A method for the preparation of a fluorescent ink layer for a fluorescent thermal transfer sheet is disclosed. The method comprises first forming a solution of a mixture comprising at least one acidic monomer, at least one basic monomer and at least one fluorescent dye. Thereafter, an emulsion of the solution is formed and the emulsion is polymerized.
Inventors
- 👤 Albert C. Chiang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:16
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/382; B41M5/38207; C; C09; C09K; C09K11/00; C09K11/02; Y; Y10; Y10S; Y10S428/00; Y10S428/914
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
119 words
A method for the preparation of a fluorescent ink layer for a flouorescent thermal transfer sheet comprising: (a) forming a solution of a mixture comprising at least one acidic monomer having the basic formula: ##STR5## where R 1 =H, CH 3 and R 2 is COOH, R 3 COOH wherein R 3 is C 1 -C 8 at least one basis monomer and at least one fluorescent dye the basic monomer having the basic formula: ##STR6## wherein R 4 is H, CH 3 and R 5 is OH, R 6 OH wherein R 6 is C 1 -C 8 (b) forming an emulsion of the solution formed in step (a); and (c) polymerizing the emulsion formed in step (b).
Claim 2
Independent Claim
119 words
A method for the preparation of a fluorescent ink layer for a flouorescent thermal transfer sheet comprising: (a) forming a solution of a mixture comprising at least one acidic monomer having the basic formula: ##STR5## where R 1 =H, CH 3 and R 2 is COOH, R 3 COOH wherein R 3 is C 1 -C 8 at least one basis monomer and at least one fluorescent dye the basic monomer having the basic formula: ##STR6## wherein R 4 is H, CH 3 and R 5 is OH, R 6 OH wherein R 6 is C 1 -C 8 (b) forming an emulsion of the solution formed in step (a); and (c) polymerizing the emulsion formed in step (b).
Claim 3
Independent Claim
133 words
A method for the preparation of a fluorescent ink layer for a fluorescent thermal transfer sheet comprising: (a) forming a neutralized solution by: (i) mixing together at least one acidic monomer and at least one fluorescent dye, the acidic monomer having the basic formula: ##STR7## where R 1 =H, CH 3 and R 2 is COOH, R 3 COOH wherein R 3 is C 1 -C 8 and (ii) adding at least one basic monomer to the mixture of step (i), the basic monomer having the basic formula: ##STR8## wherein R 4 is H, CH 3 and R 5 is OH, R 6 OH wherein R 6 is C 1 -C 8 ; (b) adding an emulsifier to the mixture formed by step (a) to form an emulsion; and (c) polymerizing said emulsion.
Claim 4
Independent Claim
133 words
A method for the preparation of a fluorescent ink layer for a fluorescent thermal transfer sheet comprising: (a) forming a neutralized solution by: (i) mixing together at least one acidic monomer and at least one fluorescent dye, the acidic monomer having the basic formula: ##STR7## where R 1 =H, CH 3 and R 2 is COOH, R 3 COOH wherein R 3 is C 1 -C 8 and (ii) adding at least one basic monomer to the mixture of step (i), the basic monomer having the basic formula: ##STR8## wherein R 4 is H, CH 3 and R 5 is OH, R 6 OH wherein R 6 is C 1 -C 8 ; (b) adding an emulsifier to the mixture formed by step (a) to form an emulsion; and (c) polymerizing said emulsion.
Claim 5
Dependent Claim
20 words
A method according to claim 2 wherein the ratio of acidic monomer to fluorescent dye is about 2:1 to 5:1.
Claim 6
Dependent Claim
16 words
A method according to claim 2 wherein said neutralized emulsion is prepared at about room temperature.
Claim 7
Dependent Claim
29 words
A method according to claim 2 wherein said neutralized emulsion is polymerized by heating to a temperature of about 60° C. to about 70° C. and stirring the solution.
Claim 8
Dependent Claim
23 words
A method according to claim 2 wherein said emulsion is polymerized at about room temperature by adding an initiator to said neutralized emulsion.
Claim 9
Dependent Claim
16 words
A method according to claim 6 wherein a reducing agent is added along with said initiator.
Claim 10
Independent Claim
129 words
A method for the preparation of a fluorescent ink layer for a fluorescent thermal transfer sheet comprising: (a) forming a solution of a mixture comprising at least one acidic monomer having the basic formula: ##STR9## where R 1 =H, CH 3 and R 2 is COOH, R 3 COOH wherein R 3 is C 1 -C 8 at least one basic monomer having the basic formula: ##STR10## wherein R 4 is H, CH 3 and R 5 is OH, R 6 OH wherein R 6 is C 1 -C 8 and at least one fluorescent dye; (b) forming an emulsion of the solution formed in step (a); (c) adding at least one vinyl monomer to the emulsified solution of step (b); and (d) polymerizing the solution of step (c).
Claim 11
Independent Claim
129 words
A method for the preparation of a fluorescent ink layer for a fluorescent thermal transfer sheet comprising: (a) forming a solution of a mixture comprising at least one acidic monomer having the basic formula: ##STR9## where R 1 =H, CH 3 and R 2 is COOH, R 3 COOH wherein R 3 is C 1 -C 8 at least one basic monomer having the basic formula: ##STR10## wherein R 4 is H, CH 3 and R 5 is OH, R 6 OH wherein R 6 is C 1 -C 8 and at least one fluorescent dye; (b) forming an emulsion of the solution formed in step (a); (c) adding at least one vinyl monomer to the emulsified solution of step (b); and (d) polymerizing the solution of step (c).
Claim 12
Dependent Claim
20 words
A method according to claim 8 wherein the ratio of acid monomer to fluorescent dye is about 2:1 to 5:1.
Claim 13
Dependent Claim
16 words
A method according to claim 8 wherein said neutralized emulsion is prepared at about room temperature.
Claim 14
Dependent Claim
28 words
A method according to claim 8 wherein said neutralized emulsion is polymerized by heating to a temperature of about 60° C. to about 70° C. and then stirring.
Claim 15
Dependent Claim
23 words
A method according to claim 8 wherein said emulsion is polymerized at about room temperature by adding an initiator to said neutralized emulsion.
Claim 16
Dependent Claim
15 words
A method according to claim 12 wherein a reducing agent is added with said initiator.
Claim 17
Independent Claim
39 words
A method according to claims 1, 2, or 8 wherein the number moles of said basic monomer is equal to or greater than the total number of moles of the combination of said fluorescent dye and said acidic monomer.
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) | 1990-04-13 | 1990-10-13 | 1991-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-13 | 1994-10-13 | 1995-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-13 | 1998-10-13 | 1999-04-14 | $7700.00 | Window Closed / Lapsed |