EP0219743A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Security paper containing vesiculated beads
Assignee: DeSoto Inc
•
Filing: 1986-10-02
•
Granted: —
•
Expires: 2006-10-02
Abstract
Abstract Security paper contains polymeric vesiculated beads having a volume average particle size of at least about 10 microns up to about 35 microns, these beads containing dye or pigment which glows when irradiated with nonvisible radiation, and being hard to see when the paper is viewed with the naked eye under normal visible light.
Inventors
- 👤 Robert H. Hamilton
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 08:27
CPC Classifications
D; D21; D21H; D21H21/00; D21H21/14; D21H21/40; D21H21/44; D21H21/48
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
62 words
A security paper containing polymeric vesiculated beads having transparent walls and a volume average particle size of at least about 10 microns up to about 35 microns, said vesiculated beads containing dye or pigment which glows when irradiated with nonvisible radiation, and said vesiculated beads being hard to see when the paper is viewed with the naked eye under normal visible light.
Claim 2
Dependent Claim
62 words
A security paper containing polymeric vesiculated beads having transparent walls and a volume average particle size of at least about 10 microns up to about 35 microns, said vesiculated beads containing dye or pigment which glows when irradiated with nonvisible radiation, and said vesiculated beads being hard to see when the paper is viewed with the naked eye under normal visible light.
Claim 3
Dependent Claim
25 words
A security paper as recited in claim 1 in which said vesiculated beads have a volume average particle size of at least about 20 microns.
Claim 4
Dependent Claim
34 words
A security paper as recited in claim 1 in which said vesiculated beads are present in an amount of from 0.1% to 15% and contain an average of at least 5 cells per bead.
Claim 5
Dependent Claim
50 words
A security paper as recited in claim 3 in which said vesiculated beads have a ratio of granular diameter to mean vesicle diameter of at least 5:1, a vesicle volume of from 5% to 95% of the volume of the granule, and not more than about 60% pigment, by volume.
Claim 6
Dependent Claim
30 words
S. A security paper as recited in claim 1 in which said vesiculated beads are incorporated in the furnish to be relatively uniformly distributed throughout the body of the paper.
Claim 7
Dependent Claim
14 words
A security paper as recited in claim 5 in which said paper is calendered.
Claim 8
Dependent Claim
32 words
A security paper as recited in claim 5 in which the polymeric body of said beads is constituted by a carboxyl-functional unsaturated polyester resin cross-linked by an ethylenically unsaturated monomer copolymerizable therewith.
Claim 9
Dependent Claim
29 words
A security paper as recited in claim 7 in which from 35% to 45% of unsaturated polyester containing maleate unsaturation is cross-linked with from 55% to 65% of styrene.
Claim 10
Dependent Claim
22 words
A security paper as recited in claim 1 in which said pigment or dye is associated with the walls of said cells.
Claim 11
Dependent Claim
23 words
A security paper as recited in claim 1 in which said vesiculated beads are present in an amount of from 0.5% to 5%.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.