US2543741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating and sealing composition of flake copper, powdered lead, graphite, and petroleum vehicle
Assignee: Richfield Oil Corp
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Filing: 1948-12-02
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Granted: 1951-02-27
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Expires: 1968-12-02
Abstract
No abstract record available.
Inventors
- 👤 Henry C Zweifel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:32
CPC Classifications
C; C10; C10M; C10M7/00; C10M2201/00; C10M2201/04; C10M2201/041; C10M2201/042; C10M2201/05; C10M2203/00; C10M2207/00; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/129; C10M2207/40; C10M2207/404; C10M2217/00; C10M2217/04; C10M2217/042; C10M2217/043; C10M2219/00; C10M2219/08; C10M2219/082; C10M2219/085; C10N; C10N2010/00; C10N2010/02; C10N2010/04; C10N2010/06; C10N2010/08; C10N2040/00; C10N2040/02; C10N2050/00; C10N2050/015; C10N2050/02; C10N2050/08; C10N2050/10; C10N2060/00; C10N2060/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A THREAD SEALING AND LUBRICATING COMPOUND COMPRISING ESSENTIALLY FINELY-DIVIDED COPPER IN FLAKE FORM OF PARTICLE SIZE WITHIN THE RANGE OF FROM ONE MICRON TO ABOUT 76 MICRONS, POWERED LEAD, AMORPHOUS GRAPHITE AND A PETROLEUM VEHICLE, THE PETROLEUM VEHICLE COMPRISING FROM ABOUT 30% TO ABOUT 85% OF THE COMPOUND AND FORMING A MEDIUM IN WHICH THE FINELY-DIVIDED COPPER, THE POWDERED LEAD AND THE AMORPHOUS GRAPHITE ARE SUSPENDED, THE LEAD BEING PRESENT IN AMOUNT FROM ABOUT ONE-THIRD PART TO THREE PARTS BY WEIGHT TO EACH PART BY WEIGHT OF THE GRAPHITE, AND THE PROPORTION OF THE FINELY-DIVIDED COPPER TO THE COMBINED AMOUNT OF THE COPPER, LEAD AND GRAPHITE BEING IN THE RANGE OF FROM 5 TO 100%.
Claim 2
Dependent Claim
115 words
A THREAD SEALING AND LUBRICATING COMPOUND COMPRISING ESSENTIALLY FINELY-DIVIDED COPPER IN FLAKE FORM OF PARTICLE SIZE WITHIN THE RANGE OF FROM ONE MICRON TO ABOUT 76 MICRONS, POWERED LEAD, AMORPHOUS GRAPHITE AND A PETROLEUM VEHICLE, THE PETROLEUM VEHICLE COMPRISING FROM ABOUT 30% TO ABOUT 85% OF THE COMPOUND AND FORMING A MEDIUM IN WHICH THE FINELY-DIVIDED COPPER, THE POWDERED LEAD AND THE AMORPHOUS GRAPHITE ARE SUSPENDED, THE LEAD BEING PRESENT IN AMOUNT FROM ABOUT ONE-THIRD PART TO THREE PARTS BY WEIGHT TO EACH PART BY WEIGHT OF THE GRAPHITE, AND THE PROPORTION OF THE FINELY-DIVIDED COPPER TO THE COMBINED AMOUNT OF THE COPPER, LEAD AND GRAPHITE BEING IN THE RANGE OF FROM 5 TO 100%.
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) | 1954-02-26 | 1954-08-28 | 1955-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-26 | 1958-08-28 | 1959-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-26 | 1962-08-28 | 1963-02-27 | $7700.00 | Window Closed / Lapsed |