Patent US1803380A successfully refreshed from Google Patents.
US1803380A
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US
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Filtering material and method of filtering sugar juices
Assignee: Oliver United Filters Inc
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Filing: 1925-07-21
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Granted: 1931-05-05
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Expires: 1945-07-21
Abstract
No abstract record available.
Inventors
- 👤 Robert C Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:27
CPC Classifications
B; B01; B01D; B01D33/00; B01D33/15; B01D33/21; B01D33/23; B01D33/44; B01D33/46; B01D33/466; 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) | 1934-05-04 | 1934-11-03 | 1935-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-05-04 | 1938-11-03 | 1939-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-05-04 | 1942-11-03 | 1943-05-05 | $7700.00 | Window Closed / Lapsed |