US3133477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self lubricating piston
Assignee: US Philips Corp
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Filing: 1961-11-10
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Granted: 1964-05-19
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Expires: 1981-11-10
Abstract
No abstract record available.
Inventors
- 👤 Meijer Roelf Jan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:22
CPC Classifications
F; F16; F16J; F16J1/00; F16J1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A COMBINATION OF A CYLINDER WITH A PISTON ADAPTED FOR RECIPROCATION THEREIN AND HAVING A STRAIGHT LINE GUIDING MEANS FOR SAID PISTON COMPRISING SAID CYLINDER AND PISTON HAVING INTERFITTING SURFACES, SUBSTANNTIALLY WITHOUT CLEARANCE, THE OUTER SURFACE OF SAID PITSON BEING PROVIDED WITH A SELF LUBRICATING MEANS CONSTITUTING A LAYER AFFIXED THEREON OF A MIXTURE OF PULVERIZED AND SPRAYED WHILE METAL AND MOLYBDENUM DISULPHIDE.
Claim 2
Dependent Claim
63 words
A COMBINATION OF A CYLINDER WITH A PISTON ADAPTED FOR RECIPROCATION THEREIN AND HAVING A STRAIGHT LINE GUIDING MEANS FOR SAID PISTON COMPRISING SAID CYLINDER AND PISTON HAVING INTERFITTING SURFACES, SUBSTANNTIALLY WITHOUT CLEARANCE, THE OUTER SURFACE OF SAID PITSON BEING PROVIDED WITH A SELF LUBRICATING MEANS CONSTITUTING A LAYER AFFIXED THEREON OF A MIXTURE OF PULVERIZED AND SPRAYED WHILE METAL AND MOLYBDENUM DISULPHIDE.
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) | 1967-05-19 | 1967-11-18 | 1968-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-19 | 1971-11-18 | 1972-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-19 | 1975-11-18 | 1976-05-19 | $7700.00 | Window Closed / Lapsed |