Patent US2939809A successfully refreshed from Google Patents.
US2939809A
Expired / Lapsed
US
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Dry film lubrication
Assignee: Douglas Aircraft Co Inc
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Filing: 1956-12-07
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Granted: 1960-06-07
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Expires: 1976-12-07
Abstract
No abstract record available.
Inventors
- 👤 Darwin P Jensen
- 👤 John R Jones
- 👤 John M Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:18
CPC Classifications
C; C10; C10M; C10M7/00; C23; C23C; C23C22/00; C23C22/73; C23C22/74; C10M2201/00; C10M2201/06; C10M2201/065; C10M2201/066; C10M2201/085; C10N; C10N2050/00; C10N2050/015; C10N2050/02; C10N2050/08; C10N2050/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
THE COMPOSITION OF MATTER, IN THE FORM OF A LIQUID SUSPENSION USEFUL FOR FORMING A DRY LUBRICANT ON THE FINELY POWDERED MOLYBDENUM DISULFIDE LUBRICANT ON THE SURFACE OF A METALLIC ELEMENT SUBJECTED IN USE TO MECHANICAL FRICTION, CONSISTING ESSENTIALLY OF FINELY OWDERED, SOLID MOLYBDENUM DISULFIDE LUBRICANT, POLYMERIZABLE PHOSPHORIC ACID THE PHOSPHORUS OF WHICH IS PENTAVALENT AND BONDED TO FOUR OXYGEN ATOMS, AND A SOLVENT FOR SAID PHOSPHORIC ACID, SAID POWDERED LUBRICANT BEING IN SUSPENSION, AND THE WEIGHT RATIO OF PHOSPHORUS CONTENT IN THE PHOSPHORIC ACID TO THE MOLYBDENUM DISULFIDE BEING FROM 0.02 TO 0.20, SAID SOLVENT BEING PRESENT IN SUFFICIENT PROPORTION TO PROVIDE A LIQUID SUSPENSION WHICH CAN READILY BY APPLIED TO THE SURFACES OF A METALLIC ELEMENT IN A THIN WET FILM BY SPRAYING OR BRUSHING BUT NOT IN GREAT ENOUGH PROPORTION SO THAT THE COMPOSITION IS TOO THIN TO PRODUCE A SATISFACTORY FILM WHICH UPON CURING FORMS A DRY LUBRICANT FILM.
Claim 2
Dependent Claim
153 words
THE COMPOSITION OF MATTER, IN THE FORM OF A LIQUID SUSPENSION USEFUL FOR FORMING A DRY LUBRICANT ON THE FINELY POWDERED MOLYBDENUM DISULFIDE LUBRICANT ON THE SURFACE OF A METALLIC ELEMENT SUBJECTED IN USE TO MECHANICAL FRICTION, CONSISTING ESSENTIALLY OF FINELY OWDERED, SOLID MOLYBDENUM DISULFIDE LUBRICANT, POLYMERIZABLE PHOSPHORIC ACID THE PHOSPHORUS OF WHICH IS PENTAVALENT AND BONDED TO FOUR OXYGEN ATOMS, AND A SOLVENT FOR SAID PHOSPHORIC ACID, SAID POWDERED LUBRICANT BEING IN SUSPENSION, AND THE WEIGHT RATIO OF PHOSPHORUS CONTENT IN THE PHOSPHORIC ACID TO THE MOLYBDENUM DISULFIDE BEING FROM 0.02 TO 0.20, SAID SOLVENT BEING PRESENT IN SUFFICIENT PROPORTION TO PROVIDE A LIQUID SUSPENSION WHICH CAN READILY BY APPLIED TO THE SURFACES OF A METALLIC ELEMENT IN A THIN WET FILM BY SPRAYING OR BRUSHING BUT NOT IN GREAT ENOUGH PROPORTION SO THAT THE COMPOSITION IS TOO THIN TO PRODUCE A SATISFACTORY FILM WHICH UPON CURING FORMS A DRY LUBRICANT FILM.
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) | 1963-06-07 | 1963-12-07 | 1964-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-07 | 1967-12-07 | 1968-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-07 | 1971-12-07 | 1972-06-07 | $7700.00 | Window Closed / Lapsed |