Patent US3272602A successfully refreshed from Google Patents.
US3272602A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing uranium dioxide powder
Assignee: Individual
•
Filing: 1960-12-09
•
Granted: 1966-09-13
•
Expires: 1980-12-09
Abstract
No abstract record available.
Inventors
- 👤 Suehiro Yoshiyuki
- 👤 Takashima Akio
- 👤 Suzuki Takashi
- 👤 Doi Hidekazu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:54
CPC Classifications
C; C01; C01G; C01G43/00; C01G43/01; C01G43/025; G; G21; G21C; G21C3/00; G21C3/42; G21C3/58; G21C3/62; G21C3/623; C01P; C01P2004/00; C01P2004/60; C01P2004/61; C01P2006/00; C01P2006/10; C01P2006/11; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
A METHOD OF PRODUCING URANIUM DIOXIDE POWDER OF AN O/U MOL RATIO OF ABOUT 2.00 HAVING HOMOGENEOUS PARTICLES OF BETWEEN ABOUT 2 TO ABOUT 150 MIRCONS AND A PARTICLE DENSITY OF AT LEAST 98% COMPRISING THE STEPS OF PRECIPITATING AMMONIUM DIURANATE FROM AN AQUEOUS SOLUTION OF REFINED URANYL SALT OF LESS THAN 100 GRAMS PER LITER BY THE ADDITION AQUEOUS AMMONIA OF A CONCENTRATION OF ABOUT 28% OR LESS AT A RATE OF ABOUT 200 GRAMS OF AMMONIA PER KILOGRAM OF SAID URANIUM PER MINUTE OR LESS SO AS TO OBTAIN A SUFFICIENTLY QUANTATIVE URANIUM PRECIPITATION; DRYING AND THERMALLY DECOMPOSING THE PRECIPITATE AMMONIUM DIURATE AT A TEMPERATURE BELOW 900*C. INTO MATERIAL SELECTED FROM THE GROUP CONSISTING OF URANIUM TRIOXIDE AND TRIURANIUM OCTOXIDE; AND REDUCING SAID SINTERING SAID MATERIAL IN A CURRENT OF HYDROGEN GAS AT A TEMPERATURE OF BETWEEN ABOUT 1200*C. TO ABOUT 1750*C.
Claim 2
Independent Claim
144 words
A METHOD OF PRODUCING URANIUM DIOXIDE POWDER OF AN O/U MOL RATIO OF ABOUT 2.00 HAVING HOMOGENEOUS PARTICLES OF BETWEEN ABOUT 2 TO ABOUT 150 MIRCONS AND A PARTICLE DENSITY OF AT LEAST 98% COMPRISING THE STEPS OF PRECIPITATING AMMONIUM DIURANATE FROM AN AQUEOUS SOLUTION OF REFINED URANYL SALT OF LESS THAN 100 GRAMS PER LITER BY THE ADDITION AQUEOUS AMMONIA OF A CONCENTRATION OF ABOUT 28% OR LESS AT A RATE OF ABOUT 200 GRAMS OF AMMONIA PER KILOGRAM OF SAID URANIUM PER MINUTE OR LESS SO AS TO OBTAIN A SUFFICIENTLY QUANTATIVE URANIUM PRECIPITATION; DRYING AND THERMALLY DECOMPOSING THE PRECIPITATE AMMONIUM DIURATE AT A TEMPERATURE BELOW 900*C. INTO MATERIAL SELECTED FROM THE GROUP CONSISTING OF URANIUM TRIOXIDE AND TRIURANIUM OCTOXIDE; AND REDUCING SAID SINTERING SAID MATERIAL IN A CURRENT OF HYDROGEN GAS AT A TEMPERATURE OF BETWEEN ABOUT 1200*C. TO ABOUT 1750*C.
References Cited (Backward Citations)
US2953430A
Cited
US2906598A
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 |