US2300129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helical flow separator
Assignee: Individual
•
Filing: 1940-11-04
•
Granted: 1942-10-27
•
Expires: 1960-11-04
Abstract
No abstract record available.
Inventors
- 👤 Mccurdy Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:57
CPC Classifications
B; B04; B04C; B04C3/00; B01; B01D; B01D17/00; B01D17/02; B01D17/0208; B01D17/0211; B01D17/0217; B01D21/00; B01D21/0039; B01D21/0045
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) | 1945-10-26 | 1946-04-27 | 1946-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-10-26 | 1950-04-27 | 1950-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-10-26 | 1954-04-27 | 1954-10-27 | $7700.00 | Window Closed / Lapsed |