US2221210A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter for dry cleaner solvents
Assignee: National Rubber Machinery Co
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Filing: 1937-10-01
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Granted: 1940-11-12
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Expires: 1957-10-01
Abstract
No abstract record available.
Inventors
- 👤 Leslie E Soderquist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:57
CPC Classifications
D; D06; D06L; D06L1/00; D06L1/02; D06L1/10; B; B01; B01D; B01D29/00; B01D29/39; B01D29/50; B01D29/52; B01D29/62; B01D29/66; B01D35/00; B01D35/12; B01D35/30; D06F; D06F43/00; D06F43/08; D06F43/081; D06F43/085; B01D2201/00; B01D2201/16; B01D2201/165; B01D37/00; B01D37/02
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) | 1943-11-12 | 1944-05-13 | 1944-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-11-12 | 1948-05-13 | 1948-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-11-12 | 1952-05-13 | 1952-11-12 | $7700.00 | Window Closed / Lapsed |