US3272603A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory metal composite
Assignee: Duracell Inc USA
•
Filing: 1964-01-23
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Granted: 1966-09-13
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Expires: 1984-01-23
Abstract
No abstract record available.
Inventors
- 👤 Earl I Larsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:22
CPC Classifications
C; C22; C22C; C22C1/00; C22C1/04; C22C1/0475; C22C29/00; C22C29/02; C22C29/06; C22C29/067; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/929; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/1216
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A METAL COMPOSITION HAVING IMPROVED RESISTANCE TO OOXIDATION AT ELEVATED TEMPERATURES COMPOSED OF 20% TO 90% BY WEIGHT OF A REFRACTORY METAL IN THE FORM OF A POROUS MATRIX, THE BALANCE OF THE COMPOSITION BEING A COPPER-YTTRIUM ALLOY CONTAINING FROM ABOUT 0.1% TO 1.0% BY WEIGHT OF YTTRIUM, AND THE REMAINDER COPPER, SAID PORES OF SAID REFRACTORY METAL SUBSTANTIALLY FILLED WITH SAID COPPER-YTTRIUM ALLOY.
Claim 2
Dependent Claim
64 words
A METAL COMPOSITION HAVING IMPROVED RESISTANCE TO OOXIDATION AT ELEVATED TEMPERATURES COMPOSED OF 20% TO 90% BY WEIGHT OF A REFRACTORY METAL IN THE FORM OF A POROUS MATRIX, THE BALANCE OF THE COMPOSITION BEING A COPPER-YTTRIUM ALLOY CONTAINING FROM ABOUT 0.1% TO 1.0% BY WEIGHT OF YTTRIUM, AND THE REMAINDER COPPER, SAID PORES OF SAID REFRACTORY METAL SUBSTANTIALLY FILLED WITH SAID COPPER-YTTRIUM ALLOY.
References Cited (Backward Citations)
US2144249A
Cited
US2187630A
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US2697043A
Cited
US2879159A
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US2825703A
Cited
US2983996A
Cited
US3049753A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |