US2686858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrochemical paper and method of preparing same
Assignee: Individual
•
Filing: 1950-10-24
•
Granted: 1954-08-17
•
Expires: 1970-10-24
Abstract
No abstract record available.
Inventors
- 👤 Earl J Kohn
- 👤 David L Venezky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:12
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
27 words
PAPER SUITABLE FOR ELECTROLYTIC RECORDING CONTAINING A WATER-INSOLUBLE SALT OF BENZIDINE FORMED TROLYTE SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL AND AMMONIUM CHLORIDE, BROMIDES AND IODIDES.
Claim 2
Dependent Claim
27 words
PAPER SUITABLE FOR ELECTROLYTIC RECORDING CONTAINING A WATER-INSOLUBLE SALT OF BENZIDINE FORMED TROLYTE SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL AND AMMONIUM CHLORIDE, BROMIDES AND IODIDES.
References Cited (Backward Citations)
US2461892A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-16 | 1958-02-15 | 1958-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-16 | 1962-02-15 | 1962-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-16 | 1966-02-15 | 1966-08-17 | $7700.00 | Window Closed / Lapsed |