Patent US3318697A successfully refreshed from Google Patents.
US3318697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copy sheet having a layer of thermally rupturable hollow microcapsules on a conductive backing and the method of use
Assignee: 3M Co
•
Filing: 1964-04-28
•
Granted: 1967-05-09
•
Expires: 1984-04-28
Abstract
No abstract record available.
Inventors
- 👤 Raymond W Shrewsbury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:44
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/14; G03G5/142; B; B01; B01J; B01J13/00; B01J13/02; B01J13/20; B01J13/22; B41; B41M; B41M5/00; B41M5/20; B41M5/26; B41M5/28; B41M5/287; G03G13/00; G03G13/26; G03G15/00; G03G15/22; G03G15/34; G03G17/00; G03G17/02; G03G5/02; G03G5/04; G03G5/12; Y; Y10; Y10S; Y10S430/00; Y10S430/001; Y10S430/101
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A COPYSHEET WHICH COMPRISES (1) AN ELECTRICALLY CONDUCTIVE BACKING, AND IN ELECTRICAL CONTACT THEREWITH AND PHYSICALLY BONDED THERET, (2) AN ELECTRICALLY CONDUCTIVE LAYER OF LIQUID CONTAINING MICROCAPSULES SUBSTANTIALLY COEXTENSIVE WITH SAID BACKING, SAID MICROCAPSULES COMPRISING THERMALLY RUPTURABLE HOLLOW CAPSULES HAVING A MAXIMUM DIAMETER OF ABOUT 200 MICRONS, HAVING AN IMAGE FORMING COMPONENT THEREIN AND HAVING AN IMAGE FORMING COMPONENT THEREIN AND HAVING AN ELECTRICALLY CONTINUOUS JCONDUCTIVE EXTERIOR SURFACES, AND (3) A PHOTOCONDUCTIVE TOPCOATING THEREON.
Claim 2
Dependent Claim
110 words
A PROCESS WHICH COMPRISES: EXPOSING TO A LIGHT IMAGE A COPYSHEET COMPRISING (1) AN ELECTRICALLY CONDUCTIVE BACKING AND, IN ELECTRICAL CONTACT THEREWITH (2) AN ELECTRICALLY CONDUCTIVE LAYER OF MICROCAPSULES, SAID MICROCAPSULES COMPRISING THERMALLY RUPTURABLE HOLLOW CAPSULES HAVING A MAXIMUM DIAMETER OF ABOUT 200 MICRONS AND HAVING AN ELECTRICALLY CONDUCTIVE COATING THEREON AND (3) A PHOTOCONDUCTIVE TOPCOATING OVER SAID LAYER OF MICROCAPSULES; AND IMPRESSIN AN ELECTRICAL POTENTIAL BETWEEN SAID ELECTRICALLY CONDUCTIVE BACKING AND THE SURFACE OF SAID PHOTOCONDUCTIVE TOPCOATING TO EFFECT SELECTIVE ELECTRICAL CURRENT FLOW TRANSVERSALLY THROUGH THE LIGHT EXPOSED PHOTOCONDUCTIVE TOPCOATING AND ADJACENT ELECTRICALLY CONDUCTIVE LAYER OF MICROCAPSULES AND PRODUCE LOCALIZED OHMIC HEATING AND SELECTIVE THERMAL RUPTURE OF SAID MICROCAPSULES.
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) | 1970-05-08 | 1970-11-07 | 1971-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-08 | 1974-11-07 | 1975-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-08 | 1978-11-07 | 1979-05-09 | $7700.00 | Window Closed / Lapsed |