US2064813A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for utilizing furnace gases in the reclaiming of bone black and like materials
Assignee: Individual
•
Filing: 1933-04-24
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Granted: 1936-12-22
•
Expires: 1953-04-24
Abstract
No abstract record available.
Inventors
- 👤 Nathaniel R Andrews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:55
CPC Classifications
C; C01; C01B; C01B32/00; C01B32/30; C01B32/39; C01B32/354; C01B32/36; F; F28; F28D; F28D21/00; F28D2021/0019; F28D2021/0045
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) | 1939-12-22 | 1940-06-22 | 1940-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-12-22 | 1944-06-22 | 1944-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-12-22 | 1948-06-22 | 1948-12-22 | $7700.00 | Window Closed / Lapsed |