US3222920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unitary corrosion test probe having a tubular reference specimen
Assignee: Union Oil Company of California
•
Filing: 1961-12-19
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Granted: 1965-12-14
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Expires: 1981-12-19
Abstract
No abstract record available.
Inventors
- 👤 Glenn A Marsh
- 👤 Schaschl Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:10
CPC Classifications
G; G01; G01N; G01N17/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
90 words
A CORROSION-MEASURING DEVICE FOR USE IN A CORROSIVE ENVIRONMENT COMPRISING A FIRST SPECIMEN OF TUBULAR CROSSSECTION HAVING THE LONGITUDINAL OPENING THEREIN FLUIDTIGHTLY SEALED AT THE ENDS THEREOF WHEREBY THE INNER SURFACE OF SAID TUBULAR SPECIMEN IS ISOLATED FROM SAID CORROSIVE ENVIRONMENT, A SECOND RIBBON-LIKE SPECIMEN CONJUNCT WITH SAID FIRST, SAID SPECIMENS BEING FABRICATED OF AN UNDIVIDED, HOMOGENEOUS PIECE OF AN ELECTRICALLY CONDUCTIVE MATERIAL, THE EXPOSED SURFACES OF SAID SPECIMENS BEING ADAPTED TO CONTACT THE SAME CORROSIVE ENVIRONMENT, AND ELECTRICAL CONDUCTOR MEANS ELECTRICALLY CONNECTED TO THE TERMINAL ENDS OF SAID SPECIMENS.
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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) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |