US2185586A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microporous rubber filtering medium
Assignee: Uniroyal Inc
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Filing: 1938-12-20
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Granted: 1940-01-02
•
Expires: 1958-12-20
Abstract
No abstract record available.
Inventors
- 👤 Arthur E Brooks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:17
CPC Classifications
B; B01; B01D; B01D69/00; B01D69/10; B01D69/107; B01D69/1071; B01D39/00; B01D39/14; B01D71/00; B01D71/06; B01D71/24
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) | 1943-01-01 | 1943-07-03 | 1944-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-01-01 | 1947-07-03 | 1948-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-01-01 | 1951-07-03 | 1952-01-02 | $7700.00 | Window Closed / Lapsed |