Patent US1170868A successfully refreshed from Google Patents.
US1170868A
Expired / Lapsed
US
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Process of purifying liquids.
Assignee: KIESELGUHR Co OF AMERICA
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Filing: 1915-03-01
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Granted: 1916-02-08
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Expires: 1935-03-01
Abstract
No abstract record available.
Inventors
- 👤 Frederick Richard Bachler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:54
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/16
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) | 1919-02-07 | 1919-08-09 | 1920-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1923-02-07 | 1923-08-09 | 1924-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1927-02-07 | 1927-08-09 | 1928-02-08 | $7700.00 | Window Closed / Lapsed |