US2373749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the manufacture of magnesium oxide
Assignee: Individual
•
Filing: 1942-04-04
•
Granted: 1945-04-17
•
Expires: 1962-04-04
Abstract
No abstract record available.
Inventors
- 👤 Elkington Frank
- 👤 Chesny Heinz Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:21
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/28; C; C01; C01F; C01F5/00; C01F5/02; C01F5/06; C01F5/08; F; F27; F27B; F27B7/00; F27B7/20; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00121; B01J2219/0015; B01J2219/00155; B01J2219/00157; B01J2219/18; B01J2219/187
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1948-04-16 | 1948-10-16 | 1949-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-04-16 | 1952-10-16 | 1953-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-04-16 | 1956-10-16 | 1957-04-17 | $7700.00 | Window Closed / Lapsed |