US1478347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for calcining lithopone
Assignee: Individual
•
Filing: 1920-06-02
•
Granted: 1923-12-18
•
Expires: 1940-06-02
Abstract
No abstract record available.
Inventors
- 👤 John L Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:12
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/04; C09C1/06; C01; C01P; C01P2006/00; C01P2006/10; C01P2006/60
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) | 1926-12-17 | 1927-06-18 | 1927-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1930-12-17 | 1931-06-18 | 1931-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1934-12-17 | 1935-06-18 | 1935-12-18 | $7700.00 | Window Closed / Lapsed |