US2425885A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal compressor
Assignee: Individual
•
Filing: 1943-07-16
•
Granted: 1947-08-19
•
Expires: 1963-07-16
Abstract
No abstract record available.
Inventors
- 👤 Jennings Irving Callender
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:41
CPC Classifications
F; F04; F04D; F04D27/00; F04D27/02; F04D27/0261; Y; Y02; Y02B; Y02B30/00; Y02B30/70; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19009
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1097729A
Cited
US1865918A
Cited
US1859607A
Cited
GB378754A
Cited
GB445005A
Cited
GB497779A
Cited
US2223715A
Cited
US2187667A
Cited
US2261463A
Cited
US2187656A
Cited
US2313205A
Cited
US2289440A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-08-18 | 1951-02-17 | 1951-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-08-18 | 1955-02-17 | 1955-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-08-18 | 1959-02-17 | 1959-08-19 | $7700.00 | Window Closed / Lapsed |