Patent US4703419A successfully refreshed from Google Patents.
US3189441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnesium-lithium-thorium alloys
Assignee: Individual
•
Filing: 1963-05-27
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Granted: 1965-06-15
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Expires: 1983-05-27
Abstract
No abstract record available.
Inventors
- 👤 Paul D Frost
- 👤 Thomas G Byrer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:16
CPC Classifications
C; C22; C22C; C22C23/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
A MAGNESIUM-LITHIUM-THORIUM GROUP METAL ALLOY HAVING BETTER STABILITY AND HARDNESS AT ELEVATED TEMPERATURES THAN MAGNESIUM-LITHIUM ALLOY OF SIMILAR COMPOISITON, SAID ALLOY CONSISTING ESSENTIALLY OF LITHIUM IN AMOUNTS RANGING FROM 10 TO 12 PERCENT BY WEIGHT, THORIUM IN AMOUNTS RANGING FROM 2 TO 4 PERCENT BY WEIGHT, AND THE REMAINDER MAGNESIUM.
Claim 2
Dependent Claim
50 words
A MAGNESIUM-LITHIUM-THORIUM GROUP METAL ALLOY HAVING BETTER STABILITY AND HARDNESS AT ELEVATED TEMPERATURES THAN MAGNESIUM-LITHIUM ALLOY OF SIMILAR COMPOISITON, SAID ALLOY CONSISTING ESSENTIALLY OF LITHIUM IN AMOUNTS RANGING FROM 10 TO 12 PERCENT BY WEIGHT, THORIUM IN AMOUNTS RANGING FROM 2 TO 4 PERCENT BY WEIGHT, AND THE REMAINDER MAGNESIUM.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-14 | 1968-12-14 | 1969-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-14 | 1972-12-14 | 1973-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-14 | 1976-12-14 | 1977-06-15 | $7700.00 | Window Closed / Lapsed |