US2823151A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Highly refractive molybdenum bodies
Assignee: Fansteel Inc
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Filing: 1953-10-14
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Granted: 1958-02-11
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Expires: 1973-10-14
Abstract
No abstract record available.
Inventors
- 👤 Leonard F Yntema
- 👤 Edward A Beidler
- 👤 Ivor E Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:21
CPC Classifications
C; C23; C23C; C23C12/00; C23C12/02; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/938; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12674; Y10T428/12771; Y10T428/12806; Y10T428/12826; Y10T428/12833
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
AS AN ARTICLE OF MANUFACTURE, A REFRACTORY METAL BODY RESISTANT TO OXIDATION AT ELEVATED TEMPERATURES COMPRISING A MOLYBDENUM BASE HAVING AN EXTERIOR LAYER CONSISTING ESSENTIALLY OF AN ALLOY OR INTERMETTALIC COMPOUND OF MOLYBDENUM, SILICON AND BORON, THE BORON BEING PRESENT IN THE EXTERIOR LAYER IN AMOUNTS OF FROM ABOUT 2% TO ABOUT 10%.
Claim 2
Dependent Claim
53 words
AS AN ARTICLE OF MANUFACTURE, A REFRACTORY METAL BODY RESISTANT TO OXIDATION AT ELEVATED TEMPERATURES COMPRISING A MOLYBDENUM BASE HAVING AN EXTERIOR LAYER CONSISTING ESSENTIALLY OF AN ALLOY OR INTERMETTALIC COMPOUND OF MOLYBDENUM, SILICON AND BORON, THE BORON BEING PRESENT IN THE EXTERIOR LAYER IN AMOUNTS OF FROM ABOUT 2% TO ABOUT 10%.
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) | 1961-02-10 | 1961-08-12 | 1962-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-10 | 1965-08-12 | 1966-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-10 | 1969-08-12 | 1970-02-11 | $7700.00 | Window Closed / Lapsed |