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US1647808A
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US
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Assignee: Individual
•
Filing: 1924-12-06
•
Granted: 1927-11-01
•
Expires: 1944-12-06
Abstract
No abstract record available.
Inventors
- 👤 Neumann August
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:49
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/05; B01D24/00; B01D24/02; B01D24/10; B01D24/12; B01D24/46; B01D24/4668; B01D24/4689
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) | 1930-10-31 | 1931-05-02 | 1931-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1934-10-31 | 1935-05-02 | 1935-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1938-10-31 | 1939-05-02 | 1939-11-01 | $7700.00 | Window Closed / Lapsed |