Patent US1438797A successfully refreshed from Google Patents.
US1438797A
Expired / Lapsed
US
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Filtering apparatus for use with saccharine solutions
Assignee: Individual
•
Filing: 1921-06-08
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Granted: 1922-12-12
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Expires: 1941-06-08
Abstract
No abstract record available.
Inventors
- 👤 Vachier Rafael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:03
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/50; B01D29/52; B01D29/39; B01D29/41; B01D29/56; B01D29/62; B01D29/64; B01D29/6469; B01D29/6476; 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) | 1925-12-11 | 1926-06-12 | 1926-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1929-12-11 | 1930-06-12 | 1930-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1933-12-11 | 1934-06-12 | 1934-12-12 | $7700.00 | Window Closed / Lapsed |