US3761547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for controlling surface area of ceramic powders
Assignee: General Electric Co
•
Filing: 1970-07-17
•
Granted: 1973-09-25
•
Expires: 1990-07-17
Abstract
Abstract Process for controlling the surface area of ceramic powder to be thermally treated comprises controlling the moisture content of the powder before the powder is thermally treated.
Inventors
- 👤 L Grossman
- 👤 D Brigham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:35
CPC Classifications
G; G21; G21C; G21C3/00; G21C3/42; G21C3/58; G21C3/62; G21C3/623; C; C01; C01B; C01B13/00; C01B13/14; C01B13/145; C04; C04B; C04B35/00; C04B35/01; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
22 words
A process according to claim 1 in which the heating step is conducted under an atmospherE chemically inert to the ceramic powder.
Claim 2
Dependent Claim
34 words
A process according to claim 1 in which the atmosphere is comprised of a gas selected from the group consisting of helium, neon, argon, krypton, xenon, nitrogen, dry hydrogen, dissociated ammonia and mixtures thereof.
Claim 3
Dependent Claim
16 words
A process according to claim 1 in which the ceramic powder is comprised of uranium oxide.
Claim 4
Dependent Claim
16 words
The process according to claim 1 in which the ceramic powder is comprised of uranium dioxide.
Claim 5
Dependent Claim
16 words
A process according to claim 1 in which the ceramic powder is comprised of uranyl fluoride.
Claim 6
Dependent Claim
84 words
A process for deadening a ceramic powder during a heat treatment in excess of about 400*C where the ceramic powder has a moisture content of less than about 1016 molecules per square centimeter, the process comprising the steps of a. uniformly introducing moisture to the ceramic powder so that the moisture content of the powder is in excess of about 1016 molecules per square centimeter, and b. thereafter conducting the heat treatment on the ceramic powder at a temperature in excess of about 400*C.
Claim 7
Dependent Claim
16 words
A process according to claim 7 in which the ceramic powder is comprised of uranium oxide.
Claim 8
Dependent Claim
16 words
A process according to claim 7 in which the ceramic powder is comprised of uranium dioxide.
Claim 9
Dependent Claim
16 words
A process according to claim 7 in which the ceramic powder is comprised of uranyl fluoride.
References Cited (Backward Citations)
US2881051A
Cited
US2968537A
Cited
US3094384A
Cited
GB893061A
Cited
US3223483A
Cited
US3333930A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |