Patent US3985927A successfully refreshed from Google Patents.
US3985927A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compositions and method for producing a chemical watermark on finished paper products
Assignee: FOX RIVER PAPER COMPANY A DE CORP
•
Filing: 1975-02-24
•
Granted: 1976-10-12
•
Expires: 1995-02-24
Abstract
Abstract Compositions and method for producing chemical watermarks in finished paper products, the watermarks being produced by applying to the surface of the paper a synthetic resin composition having a chemical grouping therein capable of being insolubilized upon exposure to high frequency radiation, and thereafter exposing the resin composition to such high frequency radiation to insolubilize the resin.
Inventors
- 👤 Terry O. Norris
- 👤 Rolland A. Aubey
- 👤 John E. Haug
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:06
CPC Classifications
B; B41; B41M; B41M3/00; B41M3/10; B41M7/00; B41M7/0081; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24934
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
51 words
A chemically watermarked product comprising a paper sheet having a watermark of preselected design applied to a portion thereof, said watermark having a refractive index approximating that of the paper and being an insoluble reaction product produced by irradiation of a synthetic resin with high frequency radiation above the visible spectrum.
Claim 2
Dependent Claim
51 words
A chemically watermarked product comprising a paper sheet having a watermark of preselected design applied to a portion thereof, said watermark having a refractive index approximating that of the paper and being an insoluble reaction product produced by irradiation of a synthetic resin with high frequency radiation above the visible spectrum.
Claim 3
Dependent Claim
20 words
The product of claim 1 in which said resin composition includes a free radical polymerizable polyethylenically unsaturated monomer or prepolymer.
Claim 4
Dependent Claim
36 words
The product of claim 2 in which said synthetic resin is an ester of an aliphatic polyhydric alcohol with at least 2 mols of an unsaturated carboxylic acid containing up to five carbon atoms per molecule.
Claim 5
Dependent Claim
12 words
The product of claim 3 in which said acid is acrylic acid.
Claim 6
Dependent Claim
12 words
The product of claim 3 in which said acid is methacrylic acid.
Claim 7
Dependent Claim
12 words
The product of claim 3 in which said acid is itaconic acid.
Claim 8
Dependent Claim
13 words
The product of claim 3 in which said composition also includes a photoinitiator.
Claim 9
Independent Claim
96 words
The method of applying a chemical watermark to paper which comprises applying to the surface of a finished paper a synthetic resin composition having a chemical grouping thereon capable of being insolubilized upon exposure to high frequency radiation, said resin composition being applied in the form of a preselected design in a preselected small area of the paper, said resin composition having a viscosity suitable for such coating and being insufficiently cross-linked to be chemically set, and thereafter exposing said resin composition to high frequency radiation above the visible spectrum to thereby insolubilize said resin composition.
Claim 10
Independent Claim
96 words
The method of applying a chemical watermark to paper which comprises applying to the surface of a finished paper a synthetic resin composition having a chemical grouping thereon capable of being insolubilized upon exposure to high frequency radiation, said resin composition being applied in the form of a preselected design in a preselected small area of the paper, said resin composition having a viscosity suitable for such coating and being insufficiently cross-linked to be chemically set, and thereafter exposing said resin composition to high frequency radiation above the visible spectrum to thereby insolubilize said resin composition.
Claim 11
Dependent Claim
16 words
The method of claim 8 in which said high frequency radiation is rich in ultraviolet light.
Claim 12
Dependent Claim
13 words
The method of claim 8 in which said composition also includes a photoinitiator.
Claim 13
Dependent Claim
15 words
The method of claim 8 in which said composition is applied as a solvent solution.
Claim 14
Dependent Claim
22 words
The method of claim 8 in which said synthetic resin composition includes a free radical polymerizable polyethylenically unsaturated monomer or a prepolymer.
Claim 15
Dependent Claim
36 words
The method of claim 12 in which said synthetic resin is an ester of an aliphatic polyhydric alcohol with at least 2 mols of an unsaturated carboxylic acid containing up to 5 carbon atoms per molecule.
Claim 16
Dependent Claim
12 words
The method of claim 13 in which said acid is acrylic acid.
Claim 17
Dependent Claim
12 words
The method of claim 13 in which said acid is methacrylic acid.
Claim 18
Dependent Claim
12 words
The method of claim 13 in which said acid is itaconic acid.
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) | 1979-10-12 | 1980-04-12 | 1980-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-12 | 1984-04-12 | 1984-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-12 | 1988-04-12 | 1988-10-12 | $7700.00 | Window Closed / Lapsed |