US3751247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoconductive compositions containing ferrocene-containing aldehyde polymers
Assignee: 3M Co
•
Filing: 1971-04-08
•
Granted: 1973-08-07
•
Expires: 1991-04-08
Abstract
Abstract This invention relates to photoconductive compositions which become permanently conductive when exposed to actinic radiation. The compositions comprise a ferrocene-containing polymer in intimate association with another compound, which is preferably one containing halogen atoms, the composition forming a conductive reaction product when exposed to actinic radiation. These compositions are useful in the preparation of photoconductive layers which can be used in image reproduction processes particularly to copy finely-detailed originals giving continuous tone copies.
Inventors
- 👤 D Swan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:42
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/026; Y; Y10; Y10S; Y10S522/00; Y10S522/904
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
11 words
A composition according to claim 1 which additionally contains a binder.
Claim 2
Dependent Claim
21 words
A composition according to claim 1 in which said ferrocene-containing polymer has been prepared by condensation of ferrocene with an aldehyde.
Claim 3
Dependent Claim
33 words
A composition according to claim 3 in which said ferrocene-containing polymer has been prepared by condensation of ferrocene with an aldehyde chosen from the group consisting of formaldehyde and the formaldehyde precursor paraformaldehyde.
Claim 4
Dependent Claim
30 words
A composition according to claim 3 in which said ferrocene-containing polymer has been prepared by condensation of ferrocene with an aldehyde chosen from the group consisting of benzaldehyde and salicylaldehyde.
Claim 5
Dependent Claim
26 words
A composition according to claim 1 in which said compound containing halogen atoms is chosen from the group consisting of carbon tetrabromide, iodoform, hexabromoethane and tribromoquinaldine.
Claim 6
Dependent Claim
16 words
A composition according to claim 1 in which said compound containing halogen atoms is 2-methyl-4,6-bis(trichloromethyl) triazine.
Claim 7
Dependent Claim
27 words
A composition according to claim 1 which contains from 0.01 to 3 moles of said organic compound containing halogen atom per mole of said ferrocene containing polymer.
Claim 8
Dependent Claim
23 words
A composition according to claim 1 which contains from 0.01 to 3 moles of said other compound per mole of said ferrocene-containing polymer.
Claim 9
Dependent Claim
31 words
A photoconductive material comprising: a. a layer of a photoconductive composition according to claim 1 b. an electrically conductive backing, said layer being supported on backing in electrically conductive relationship therewith.
Claim 10
Dependent Claim
38 words
A photoconductive material according to claim 10 in which said backing comprises a laminate of an electrically conductive layer and an insulating support, said layer of said photoconductive composition being in electrical contact with said electrically conductive layer.
Claim 11
Dependent Claim
23 words
A photoconductive material according to claim 10 in which said layer of photoconductive composition has a thickness of from 1 to 150 microns.
Claim 12
Dependent Claim
26 words
The material having a permanently conductive image pattern which results when the photoconductive material of claim 10 is exposed image-wise to light or other actinic radiation.
Claim 13
Dependent Claim
22 words
The visible image material which results upon developing a visible image from the permanently conductive image of the material of claim 13.
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) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |