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US2042564A
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Assignee: Individual
•
Filing: 1932-09-06
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Granted: 1936-06-02
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Expires: 1952-09-06
Abstract
No abstract record available.
Inventors
- 👤 Ernest J Sweetland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:05
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/18; B01D29/00; B01D29/11; B01D29/111; B01D29/13; B01D29/15; B01D29/50; B01D29/52; B01D29/54; B01D2201/00; B01D2201/18
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) | 1939-06-02 | 1939-12-02 | 1940-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-06-02 | 1943-12-02 | 1944-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-06-02 | 1947-12-02 | 1948-06-02 | $7700.00 | Window Closed / Lapsed |