Patent US5533898A successfully refreshed from Google Patents.
Patent US3301781A successfully refreshed from Google Patents.
US3301781A
Expired / Lapsed
US
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Method of making magnesium fluoride articles
Assignee: Motors Liquidation Co
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Filing: 1964-10-27
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Granted: 1967-01-31
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Expires: 1984-10-27
Abstract
No abstract record available.
Inventors
- 👤 Hal H Rice
- 👤 Maurice J Garey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:47
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; C; C04; C04B; C04B35/00; C04B35/515; C04B35/553; F16C33/043; F16C33/06; F16C33/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
A SINTERED HIGH STRENGTH ARTICLE WHICH COMPRISES MAGNESIUM FLUORIDE AND A SMALL BUT EFFECTIVE AMOUNT OF AT LEAST ONE COMPOUND SELECTED FROM THE GROUP WHICH INCLUDES LITHIUM HALIDE SALTS AND THE PENTOXIDE COMPOUNDS OF VANADIUM, ARSENIC AND PHOSPHORUS.
Claim 2
Dependent Claim
50 words
A SINTERED HIGH STRENGTH BEARING ELEMENT WHICH COMPRISES MAGNESIUM FLUORIDE POWDER HAVING UNIFORMLY DISPERSED THERETHROUGH ABOUT 0.2 GRAM ATOMIC PERCENT OF A SINTERING ADDITIVE SELECTED FROM THE GROUP CONSISTING OF VANADIUM PENTOXIDE, ARSENIC PENTOXIDE AND PHOSPHORUS PENTOXIDE, SAID POWDER BEING COMPACTED AND SINTERED IN THE FORM OF A BEARING ELEMENT.
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) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |