Patent US3449658A successfully refreshed from Google Patents.
US3449658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for sensitometrically testing photoconductive insulators
Assignee: Eastman Kodak Co
•
Filing: 1966-11-17
•
Granted: 1969-06-10
•
Expires: 1986-11-17
Abstract
No abstract record available.
Inventors
- 👤 Gene H Robinson
- 👤 James G Jarvis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:02
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/75; G01; G01N; G01N27/00; G01N27/60; G03G5/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
APPARATUS FOR SENSITOMETRICALLY TESTING A STRIP OF PHOTOCONDUCTIVE INSULATING MATERIAL COMPRISING: A STRIP SUPPORT MOVABLE IN A PRESCRIBED PATH SEQUENTIALLY AT A CHARGING RATE AND AT AN EXPOSURE RATE; A CORONA CHARGING SOURCE ARRANGED RELATIVE TO SAID PATH FOR APPPLYING A PREDETERMINED SURFACE CHARGE TO SAID STRIP; MEANS ARRANGED RELATIVE TO SAID PATH AND SPACED FROM SAID CORONA SOURCE FOR EXPOSING SAID STRIP AFTER BEING CHARGED; AN ABSORPTIVE WEDGE HAVING A CONTINUOUSLY VARYING DENSITY THROUGHOUT ITS LENGTH POSITIONED BETWEEN SAID STRIP SUPPORT AND SAID EXPOSING MEANS AND MOVABLE RELATIVE TO SAID EXPOSING MEANS;
Claim 2
Dependent Claim
93 words
APPARATUS FOR SENSITOMETRICALLY TESTING A STRIP OF PHOTOCONDUCTIVE INSULATING MATERIAL COMPRISING: A STRIP SUPPORT MOVABLE IN A PRESCRIBED PATH SEQUENTIALLY AT A CHARGING RATE AND AT AN EXPOSURE RATE; A CORONA CHARGING SOURCE ARRANGED RELATIVE TO SAID PATH FOR APPPLYING A PREDETERMINED SURFACE CHARGE TO SAID STRIP; MEANS ARRANGED RELATIVE TO SAID PATH AND SPACED FROM SAID CORONA SOURCE FOR EXPOSING SAID STRIP AFTER BEING CHARGED; AN ABSORPTIVE WEDGE HAVING A CONTINUOUSLY VARYING DENSITY THROUGHOUT ITS LENGTH POSITIONED BETWEEN SAID STRIP SUPPORT AND SAID EXPOSING MEANS AND MOVABLE RELATIVE TO SAID EXPOSING MEANS;
References Cited (Backward Citations)
US2781705A
Cited
US3321307A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-09 | 1972-12-09 | 1973-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-09 | 1976-12-09 | 1977-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-09 | 1980-12-09 | 1981-06-10 | $7700.00 | Window Closed / Lapsed |