US3736134A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Humidity resistant photoconductive compositions
Assignee: 3M Co
•
Filing: 1970-10-14
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Granted: 1973-05-29
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Expires: 1990-10-14
Abstract
Abstract IMPROVEMENT IN THE HUMIDITY RESISTANCE OF PHOTOCONDUCTIVE TITANIUM DIOXIDE CONTAINING ELECTROGRAPHIC ELEMETS IS ACHIEVED BY COMBINING THEREWITH A CARBOXYLIC ACID OR METAL SALT THEREOF SUCH AS ABIETIC ACID OR ZINC ABIETATE WITH AN INORGANIC METAL OXIDE SUCH AS ZINC OXIDE.
Inventors
- 👤 D W Gosselink
- 👤 E D Horne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:01
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/05; G03G5/0503; G03G5/0507; G03G5/051; G03G5/0514; G03G5/08; G03G5/087
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-28 | 1976-11-27 | 1977-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-28 | 1980-11-27 | 1981-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-28 | 1984-11-27 | 1985-05-29 | $7700.00 | Window Closed / Lapsed |