Patent US2735155A successfully refreshed from Google Patents.
US2735155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
With an excess of boron
Assignee: —
•
Filing: —
•
Granted: 1956-02-21
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Expires: 1973-02-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:43
CPC Classifications
C; C22; C22C; C22C29/00; C22C29/14; C04; C04B; C04B35/00; C04B35/515; C04B35/58; C04B35/5805; C04B35/58064; C04B35/58071; C04B35/58078; C04B2235/00; C04B2235/65; C04B2235/656
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
THE METHOD OF PRODUCING A SUBSTANTIALLY PURE HOMOGENEOUS POWDER MIXTURE CONSISTING ESSENTIALLY OF A REFRACTORY METAL BORIDE AND BORON, WHICH COMPRISES THE STEPS OF PROVIDING AN INTIMATE INITIAL MIXTURE OF POWDER PARTICLES OF A MAJOR INGREDIENT CONSISTING ESSENTIALLY OF AT LEAST ONE HYDRIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF ZIRCONIUM, TITANIUM, VANADIUM, CHROMIUM, TUNGSTEN, MOLYBDENUM AND MIXTURES THEREOF WITH POWDER PARTICLES OF ADDITIONAL INGREDIENTS CONSISTING ESSENTIALLY OF BORON, COMPACTING SAID MIXTURE UNDER PRESSURE TO FORM A COMPACT, HEATING OF SAID COMPACT AT ELEVATED TEMPERATURE AT WHICH SAID MAJOR INGREDIENT DECOMPOSES AND YIELDS SAID METAL, THEREAFTER FURTHER HEATING OF SAID COMPACT AT A DIFFERENT ELEVATED TEMPERATURE AT WHICH SAID YIELDED METAL COMBINES WITH SAID BORON TO FORM A METAL BORIDE, SAID INGREDIENTS CONTAINING AN AMOUNT OF BORON IN EXCESS OF THE AMOUNT REQUIRED TO
Claim 2
Independent Claim
136 words
THE METHOD OF PRODUCING A SUBSTANTIALLY PURE HOMOGENEOUS POWDER MIXTURE CONSISTING ESSENTIALLY OF A REFRACTORY METAL BORIDE AND BORON, WHICH COMPRISES THE STEPS OF PROVIDING AN INTIMATE INITIAL MIXTURE OF POWDER PARTICLES OF A MAJOR INGREDIENT CONSISTING ESSENTIALLY OF AT LEAST ONE HYDRIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF ZIRCONIUM, TITANIUM, VANADIUM, CHROMIUM, TUNGSTEN, MOLYBDENUM AND MIXTURES THEREOF WITH POWDER PARTICLES OF ADDITIONAL INGREDIENTS CONSISTING ESSENTIALLY OF BORON, COMPACTING SAID MIXTURE UNDER PRESSURE TO FORM A COMPACT, HEATING OF SAID COMPACT AT ELEVATED TEMPERATURE AT WHICH SAID MAJOR INGREDIENT DECOMPOSES AND YIELDS SAID METAL, THEREAFTER FURTHER HEATING OF SAID COMPACT AT A DIFFERENT ELEVATED TEMPERATURE AT WHICH SAID YIELDED METAL COMBINES WITH SAID BORON TO FORM A METAL BORIDE, SAID INGREDIENTS CONTAINING AN AMOUNT OF BORON IN EXCESS OF THE AMOUNT REQUIRED TO
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) | 1959-02-20 | 1959-08-22 | 1960-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-20 | 1963-08-22 | 1964-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-20 | 1967-08-22 | 1968-02-21 | $7700.00 | Window Closed / Lapsed |