Patent US4145478A successfully refreshed from Google Patents.
US4145478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calcium oxide or hydroxide to improve the charge acceptance of electrographic dielectric resins
Assignee: Rohm and Haas Co
•
Filing: 1977-07-28
•
Granted: 1979-03-20
•
Expires: 1997-07-28
Abstract
Abstract The charge accepting capacity of electrographic dielectric coatings is improved by dispersing in an organic solvent-soluble thermoplastic insulating resin having carboxyl functionality providing an acid value of from 5-100, from 0.05-3% by weight of calcium oxide or calcium hydroxide.
Inventors
- 👤 Gerson E. Beauchamp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:57
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/0202; G03G5/0205; G03G5/0208; G03G5/0217; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/258; Y10T428/31504; Y10T428/31786; Y10T428/3179; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31899; Y10T428/31902; Y10T428/31971; Y10T428/31989
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
52 words
An electrographic dielectric layer having improved charge accepting capacity consisting essentially of a layer of organic solvent-soluble thermoplastic insulating resin having carboxyl functionality providing an acid value of from 5-100, and calcium oxide or calcium hydroxide dispersed in said layer in an amount of from 0.05-3% of the weight of said resin.
Claim 2
Dependent Claim
52 words
An electrographic dielectric layer having improved charge accepting capacity consisting essentially of a layer of organic solvent-soluble thermoplastic insulating resin having carboxyl functionality providing an acid value of from 5-100, and calcium oxide or calcium hydroxide dispersed in said layer in an amount of from 0.05-3% of the weight of said resin.
Claim 3
Dependent Claim
21 words
A layer as recited in claim 1 containing mineral filler in a pigment to binder ratio of from 1:1 to 4:1.
Claim 4
Dependent Claim
10 words
Conductive paper coated with the layer defined in claim 1.
References Cited (Backward Citations)
US3924050A
Cited
US3847661A
Cited
US3946140A
Cited
US3991253A
Cited
US3950594A
Cited
US3944705A
Cited
US4061833A
Cited
US4049488A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-03-19 | 1982-09-18 | 1983-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-19 | 1986-09-18 | 1987-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-19 | 1990-09-18 | 1991-03-20 | $7700.00 | Window Closed / Lapsed |