US3265540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of arg hardenable tantalum-based alloys
Assignee: American Radiator and Standard Sanitary Corp
•
Filing: 1963-11-19
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Granted: 1966-08-09
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Expires: 1983-11-19
Abstract
No abstract record available.
Inventors
- 👤 Dennis D Foley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:51
CPC Classifications
C; C22; C22C; C22C1/00; C22C1/10; C22C1/1005; C22C1/1036; C22C27/00; C22C27/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
81 words
THE METHOD OF WORKING AND HARDENING TANTALUMBASED ALLOYS, COMPRISING THE STEPS OF: MELTING TANTALUM AND A SMALL QUANTITY OF METAL SELECTED FROM THE GROUP CONSISTING OF ZIRCONIUM AND HAFNIUM AT A TEMPERATURE LOWER THAN THE MELTING POINT OF TUNGSTEN, AND FORMING AN INGOT THEREOF: DISPERSING TUNGSTEN-COATED CARBIDE PARTICLES UNIFORMLY IN SAID INGOT AS SAID INGOT IS FORMED; COOLING SAID INGOT; SHAPING SAID INGOT; HEATING AND MAINTAINING SAID SHAPED INGOT AT AN ELEVATED TEMPERATURE TO DIFFUSE THE COATINGS FROM SAID CARBIDE PARTICLES.
References Cited (Backward Citations)
DE201297C
Cited
US3180727A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |