US2636244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of refractory articles
Assignee: Individual
•
Filing: 1950-08-16
•
Granted: 1953-04-28
•
Expires: 1970-08-16
Abstract
No abstract record available.
Inventors
- 👤 Williams Albert Etheridge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:03
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/03; C04B35/04; C04B35/053
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A PROCESS FOR THE PRODUCTION OF REFRACTORY ARTICLES MAGNESIA, WHEREIN GROUND PURE MAGNESIUM OXIDE IS FORMED INTO A SLIP BY ADMIXTURE WITH AN ANHYDROUS LOWER ALIPHATIC ALCOHOL UP TO BUTYL ALCOHOL IN QUANTITY SUFFICIENT TO MAKE A FLOWING SUSPENSION, THE SLIP IS CAST IN A POROUS MOULD AND THE DRIED CAST IS SUBSEQUENTLY FIRED AT A SINTERING TEMPERATURE.
Claim 2
Dependent Claim
58 words
A PROCESS FOR THE PRODUCTION OF REFRACTORY ARTICLES MAGNESIA, WHEREIN GROUND PURE MAGNESIUM OXIDE IS FORMED INTO A SLIP BY ADMIXTURE WITH AN ANHYDROUS LOWER ALIPHATIC ALCOHOL UP TO BUTYL ALCOHOL IN QUANTITY SUFFICIENT TO MAKE A FLOWING SUSPENSION, THE SLIP IS CAST IN A POROUS MOULD AND THE DRIED CAST IS SUBSEQUENTLY FIRED AT A SINTERING TEMPERATURE.
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) | 1956-04-27 | 1956-10-27 | 1957-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-27 | 1960-10-27 | 1961-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-27 | 1964-10-27 | 1965-04-28 | $7700.00 | Window Closed / Lapsed |