US2418012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impeller for centrifugal apparatus
Assignee: Individual
•
Filing: 1943-09-20
•
Granted: 1947-03-25
•
Expires: 1963-09-20
Abstract
No abstract record available.
Inventors
- 👤 Chester Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:17
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/26; F04D29/28; F04D29/281; F04D29/282; F04D29/30
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US863428A
Cited
US953241A
Cited
US948213A
Cited
US1158978A
Cited
US1075120A
Cited
US1434672A
Cited
US2040640A
Cited
US2047555A
Cited
US2083996A
Cited
US2268929A
Cited
US2293768A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-03-24 | 1950-09-23 | 1951-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-03-24 | 1954-09-23 | 1955-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-03-24 | 1958-09-23 | 1959-03-25 | $7700.00 | Window Closed / Lapsed |