US2660569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogen chloride gas hardening of metal oxide powder
Assignee: Individual
•
Filing: 1949-09-26
•
Granted: 1953-11-24
•
Expires: 1969-09-26
Abstract
No abstract record available.
Inventors
- 👤 Reitlinger Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:44
CPC Classifications
B; B01; B01J; B01J21/00; C; C22; C22B; C22B5/00; C22B5/02; C22B5/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A METHOD OF FORMING POROUS COHERENT METAL OXIDE GRANULES COMPRISING THE STEP OF CAUSING GASEOUS HYDROGEN CHLORIDE AND OXYGEN TO DIFFUSE SLOWLY THROUGH A COLUMN CONTAINING POWDERED OXIDES OF METALS SELECTED FROM THE GROUP CONSISTING OF TITANIUM, VANADIUM, CHROMIUM, MAGANESE, IRON, COBALT AND COPPER IN THE ABSENCE OF BINDING AGENTS AT TEMPERATURE BETWEEN 300 AND 700* C. UNTIL THE POWDER PARTICLES COHERE TO EACH OTHER AND THEN DISINTEGRATING SAID COHERENT COLUMN INTO GRANULES OF SMALLER SIZE.
Claim 2
Independent Claim
76 words
A METHOD OF FORMING POROUS COHERENT METAL OXIDE GRANULES COMPRISING THE STEP OF CAUSING GASEOUS HYDROGEN CHLORIDE AND OXYGEN TO DIFFUSE SLOWLY THROUGH A COLUMN CONTAINING POWDERED OXIDES OF METALS SELECTED FROM THE GROUP CONSISTING OF TITANIUM, VANADIUM, CHROMIUM, MAGANESE, IRON, COBALT AND COPPER IN THE ABSENCE OF BINDING AGENTS AT TEMPERATURE BETWEEN 300 AND 700* C. UNTIL THE POWDER PARTICLES COHERE TO EACH OTHER AND THEN DISINTEGRATING SAID COHERENT COLUMN INTO GRANULES OF SMALLER SIZE.
References Cited (Backward Citations)
US933269A
Cited
US2176242A
Cited
US2131006A
Cited
US2191981A
Cited
US2306665A
Cited
US2374454A
Cited
US2463413A
Cited
GB583809A
Cited
US2413492A
Cited
US2445648A
Cited
US2411873A
Cited
US2511400A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-23 | 1957-05-25 | 1957-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-23 | 1961-05-25 | 1961-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-23 | 1965-05-25 | 1965-11-24 | $7700.00 | Window Closed / Lapsed |