Patent US3178901A successfully refreshed from Google Patents.
US3178901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic control apparatus
Assignee: Honeywell Inc
•
Filing: 1962-10-29
•
Granted: 1965-04-20
•
Expires: 1982-10-29
Abstract
No abstract record available.
Inventors
- 👤 James C Blackett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:28
CPC Classifications
F; F25; F25D; F25D21/00; F25D21/02; B; B01; B01J; B01J49/00; B01J49/80; B01J49/85
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
109 words
IN A CONTROL SYSTEM, AT LEAST ONE ELECTRODE FORMING A PART OF A CIRCUIT FOR MEASURING THE RESISTANCE OF A MATERIAL BETWEEN SAID ELECTRODE AND GROUND, AN A.C. CIRCUIT HAVING A SOURCE OF A.C. VOLTAGE AND AN OUTPUT ADAPTED TO INITIATE AN OPERATION, CIRCUIT MEANS CONNECTING SAID ELECTRODE TO SAID A.C. CIRCUIT WHEREBY AN A.C. VOLTAGE IS APPLIED BETWEEN SAID ELECTRODE AND GROUND, SAID A.C. VOLTAGE CAUSING A CONTAMINATION OF SAID ELECTRODE TO INCREASE THE CIRCUIT RESISTANCE, A SOURCE OF D.C. VOLTAGE AND MEANS FOR INTERMITTENTLY DISCONNECTING SAID A.C. SOURCE AND CONNECTING SAID SOURCE OF D.C. VOLTAGE BETWEEN SAID ELECTRODE AND GROUND TO CAUSE SAID ELECTRODE TO BE CLEANED.
References Cited (Backward Citations)
US1755479A
Cited
US2010242A
Cited
US2108294A
Cited
US2959026A
Cited
US2905838A
Cited
US3059777A
Cited
US2994821A
Cited
US2941097A
Cited
US3038610A
Cited
US3080726A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-19 | 1968-10-19 | 1969-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-19 | 1972-10-19 | 1973-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-19 | 1976-10-19 | 1977-04-20 | $7700.00 | Window Closed / Lapsed |