Patent US1644728A successfully refreshed from Google Patents.
US1644728A
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Assignee: Fairbanks Morse and Co
•
Filing: 1924-08-14
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Granted: 1927-10-11
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Expires: 1944-08-14
Abstract
No abstract record available.
Inventors
- 👤 Charles B Jahnke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:48
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/18; B01D21/00; B01D21/0012; B01D21/003; B01D21/0036; B01D21/0039; B01D21/0051; B01D21/009; B01D21/24; B01D21/2427
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) | 1930-10-10 | 1931-04-11 | 1931-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1934-10-10 | 1935-04-11 | 1935-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1938-10-10 | 1939-04-11 | 1939-10-11 | $7700.00 | Window Closed / Lapsed |