Patent US1238147A successfully refreshed from Google Patents.
US1238147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making magnesia.
Assignee: Individual
•
Filing: 1916-11-07
•
Granted: 1917-08-28
•
Expires: 1936-11-07
Abstract
No abstract record available.
Inventors
- 👤 Leopold Jesser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:28
CPC Classifications
C; C01; C01F; C01F11/00; C01F11/02; C01F11/04; C01F11/06; Y; Y10; Y10S; Y10S425/00; Y10S425/101
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1920-08-27 | 1921-02-26 | 1921-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1924-08-27 | 1925-02-26 | 1925-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1928-08-27 | 1929-02-26 | 1929-08-28 | $7700.00 | Window Closed / Lapsed |