Patent US3481431A successfully refreshed from Google Patents.
US3481431A
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Lubrication system
Assignee: MASON H DORSEY
•
Filing: 1966-08-18
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Granted: 1969-12-02
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Expires: 1986-08-18
Abstract
No abstract record available.
Inventors
- 👤 Mason H Dorsey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:39
CPC Classifications
D; D04; D04B; D04B35/00; D04B35/28; F; F16; F16N; F16N7/00; F16N7/30; F16N7/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1934791A
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GB431183A
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US2667236A
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US2857019A
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US2725734A
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US2954146A
Cited
CH342255A
Cited
US3013633A
Cited
US3145803A
Cited
US3253678A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-01 | 1973-06-02 | 1973-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-01 | 1977-06-02 | 1977-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-01 | 1981-06-02 | 1981-12-02 | $7700.00 | Window Closed / Lapsed |