US2646266A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple flow column
Assignee: CF Braun and Co
•
Filing: 1948-03-22
•
Granted: 1953-07-21
•
Expires: 1968-03-22
Abstract
No abstract record available.
Inventors
- 👤 Daniel C Lockwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:39
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/14; B01D3/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US423906A
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US991970A
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US1146861A
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US1632397A
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US2051545A
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US2210808A
Cited
US2242727A
Cited
US2558222A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-20 | 1957-01-19 | 1957-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-20 | 1961-01-19 | 1961-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-20 | 1965-01-19 | 1965-07-21 | $7700.00 | Window Closed / Lapsed |