Patent US4309486A successfully refreshed from Google Patents.
US4309486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic recording material
Assignee: Felex Schoeller Jr and GmbH and Co KG
•
Filing: 1979-01-16
•
Granted: 1982-01-05
•
Expires: 1999-01-16
Abstract
Abstract Electrostatic recording material is made by coating a conducting paper support with a lacquer comprising at least one unsaturated organic compound and substantially no inert solvent and hardening the lacquer by exposure to radiation such as an electron beam or ultra-violet to form a dielectric layer. The dielectric layer retains charge well at high humidities.
Inventors
- 👤 Wieland Sack
- 👤 Reiner Anthonsen
- 👤 Ferencz Kertesz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:57
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/0202; G03G5/0205; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
61 words
A method of making an electrostatic recording material which comprises coating an electrically conducting paper support with a composition hardenable by exposure to radiation to produce a dielectric coating capable of recording a latent electrostatic image, the composition comprising at least one unsaturated organic compound and substantially no inert solvent, and exposing the coated support to radiation to harden the coating.
Claim 2
Independent Claim
61 words
A method of making an electrostatic recording material which comprises coating an electrically conducting paper support with a composition hardenable by exposure to radiation to produce a dielectric coating capable of recording a latent electrostatic image, the composition comprising at least one unsaturated organic compound and substantially no inert solvent, and exposing the coated support to radiation to harden the coating.
Claim 3
Dependent Claim
15 words
A method according to claim 1, in which said composition contains at least one pigment.
Claim 4
Dependent Claim
21 words
A method according to claim 1, in which said composition contains at least one component selected from neutral resins and plasticisers.
Claim 5
Dependent Claim
21 words
A method according to claim 1, in which said unsaturated compound is a monomer having at least one carbon-carbon double bond.
Claim 6
Dependent Claim
22 words
A method according to claim 4, in which said composition contains at least one vinyl monomer and at least one unsaturated resin.
Claim 7
Dependent Claim
20 words
A method according to claim 1, in which the coated support is exposed to ultra-violet radiation to harden the coating.
Claim 8
Dependent Claim
21 words
A method according to claim 1, in which the coated support is exposed to an electron beam to harden the coating.
Claim 9
Dependent Claim
20 words
A method according to claim 2, in which said composition contains from 10 to 60% by weight of inorganic pigment.
Claim 10
Dependent Claim
48 words
An electrostatic recording material comprising an electrically conducting paper support applied thereto a dielectric coating applied thereto capable of recording an electrostatic latent image, the dielectric coating comprising a composition hardened by exposure to radiation and comprising at least one unsaturated organic compound and substantially no inert solvent.
Claim 11
Dependent Claim
48 words
An electrostatic recording material comprising an electrically conducting paper support applied thereto a dielectric coating applied thereto capable of recording an electrostatic latent image, the dielectric coating comprising a composition hardened by exposure to radiation and comprising at least one unsaturated organic compound and substantially no inert solvent.
Claim 12
Dependent Claim
21 words
A material according to claim 9, in which said composition contains at least one component selected from neutral resins and plasticisers.
Claim 13
Dependent Claim
15 words
A material according to claim 9, in which said composition contains at least one pigment.
Claim 14
Dependent Claim
21 words
A material according to claim 9, in which said unsaturated component is a monomer having at least one carbon-carbon double bond.
Claim 15
Dependent Claim
22 words
A material according to claim 12, in which said composition contains at least one vinyl monomer and at least one unsaturated resin.
Claim 16
Dependent Claim
20 words
A material according to claim 11, in which said composition contains from 10 to 60% by weight of inorganic pigment.
References Cited (Backward Citations)
US3132584A
Cited
US3295977A
Cited
US3482513A
Cited
US3840390A
Cited
US3615448A
Cited
US4081583A
Cited
US3640766A
Cited
US3936530A
Cited
US3911170A
Cited
US4049448A
Cited
US3956562A
Cited
US4072592A
Cited
US4139675A
Cited
US4085236A
Cited
US4100045A
Cited
US4120721A
Cited
US4148639A
Cited
US4170663A
Cited
US4177310A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-01-04 | 1985-07-06 | 1986-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-04 | 1989-07-06 | 1990-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-04 | 1993-07-06 | 1994-01-05 | $7700.00 | Window Closed / Lapsed |