US2223701A
Expired / Lapsed
US
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Assignee: Individual
•
Filing: 1937-10-30
•
Granted: 1940-12-03
•
Expires: 1957-10-30
Abstract
No abstract record available.
Inventors
- 👤 Olson Gunner
- 👤 Winfield S Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:18
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/30; B01D21/00; B01D21/02; B01D21/08; B01D21/10; B01D21/12; B01D21/14; B01D21/30; B01D21/34; B01D27/00; B01D27/02; B01D29/00; B01D29/50; B01D29/56; B01D29/58; B01D35/005; B01D35/14; B01D35/147
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) | 1943-12-03 | 1944-06-03 | 1944-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-12-03 | 1948-06-03 | 1948-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-12-03 | 1952-06-03 | 1952-12-03 | $7700.00 | Window Closed / Lapsed |