US2933604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for testing oil filter elements
Assignee: Motors Liquidation Co
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Filing: 1954-09-27
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Granted: 1960-04-19
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Expires: 1974-09-27
Abstract
No abstract record available.
Inventors
- 👤 James A Norton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:49
CPC Classifications
G; G21; G21H; G21H5/00; G21H5/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
104 words
A METHOD FOR DETERMINING THE AMOUNT OF RESIN REMOVED FROM A RESIN IMPREGNATED MATERIAL BY A LIQUID SOLVENT COMING IN CONTACT WITH SAID MATERIAL, COMPRISING IMPREGNATING A SAMPLE OF SAID MATERIAL WHICH IS RESINFREE WITH RESIN WHICH IS CHEMICALLY IDENTICAL WITH THE RESIN UNDER TEST AND SYNTHESIZED FROM PRECURSORS INCLUDING A PRECURSOR WHEREIN A RADIOACTIVE ISOTOPE OF CARBON HAS BEEN SUBSTITUTED FOR AT LEAST ONE RADIOSTABLE CARBON ATOM IN SOME OF THE MOLECULES IN SAID PRECURSOR MOLECULE, EXPOSING SAID RADIOACTIVE RESIN IMPREGNATED MATERIAL TO SAID LIQUID SOLVENT AND DETERMINING THE QUANTITY OF RESIN DISSOLVED BY SAID SOLVENT BY MEASURING THE RADIOACTIVITY OF SAID SOLVENT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-19 | 1963-10-19 | 1964-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-19 | 1967-10-19 | 1968-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-19 | 1971-10-19 | 1972-04-19 | $7700.00 | Window Closed / Lapsed |