US3189802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vibrating capacitor with a coated reference electrode
Assignee: Individual
•
Filing: 1960-11-29
•
Granted: 1965-06-15
•
Expires: 1980-11-29
Abstract
No abstract record available.
Inventors
- 👤 William A Zisman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:45
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/002
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
AN APPARATUS FOR THE MEASUREMENT OF CONTACT POTENTIAL DIFFERENCES BETWEEN TWO METALS WHICH COMPRISES IN COMBINATION: MEANS FOR HOLDING A PLATE ELECTRODE IN STATIONARY POSITION, A PLATE ELECTRODE OF A REFERENCE METAL IN SAID HOLDING MEANS, SAID REFERENCE METAL ELECTRODE HAVING THE FACE THEREOF COVERED WITH A THIN CONTINUOUS LAYER OF A FULLY FLUORINATED HYDROCARBON POLYMER OF LOW SURFACE ENERGY, MEANS FOR HOLDING A PLATE ELECTRODE OF A SECOND METAL FOR VIBRATORY MOVEMENT AT AUDIO FREQUENCIES IN CLOSELY SPACED PARALLEL RELATIONSHIP TO SAID STATIONARY REFERENCE ELECTRODE,
Claim 2
Independent Claim
86 words
AN APPARATUS FOR THE MEASUREMENT OF CONTACT POTENTIAL DIFFERENCES BETWEEN TWO METALS WHICH COMPRISES IN COMBINATION: MEANS FOR HOLDING A PLATE ELECTRODE IN STATIONARY POSITION, A PLATE ELECTRODE OF A REFERENCE METAL IN SAID HOLDING MEANS, SAID REFERENCE METAL ELECTRODE HAVING THE FACE THEREOF COVERED WITH A THIN CONTINUOUS LAYER OF A FULLY FLUORINATED HYDROCARBON POLYMER OF LOW SURFACE ENERGY, MEANS FOR HOLDING A PLATE ELECTRODE OF A SECOND METAL FOR VIBRATORY MOVEMENT AT AUDIO FREQUENCIES IN CLOSELY SPACED PARALLEL RELATIONSHIP TO SAID STATIONARY REFERENCE ELECTRODE,
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-14 | 1968-12-14 | 1969-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-14 | 1972-12-14 | 1973-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-14 | 1976-12-14 | 1977-06-15 | $7700.00 | Window Closed / Lapsed |