Patent US1449622A successfully refreshed from Google Patents.
US1449622A
Expired / Lapsed
US
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Removal of solid particles from liquids
Assignee: Dorr Co
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Filing: 1920-07-07
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Granted: 1923-03-27
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Expires: 1940-07-07
Abstract
No abstract record available.
Inventors
- 👤 Peck Charles Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:55
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/16; B01D33/00; B01D33/06; B01D33/073; B01D33/44; B01D33/46; B01D33/466; B01D33/58; B01D33/60; B01D37/00
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) | 1926-03-26 | 1926-09-25 | 1927-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1930-03-26 | 1930-09-25 | 1931-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1934-03-26 | 1934-09-25 | 1935-03-27 | $7700.00 | Window Closed / Lapsed |