US2772852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotor construction for fluid machines
Assignee: Stalker Development Co
•
Filing: 1950-08-03
•
Granted: 1956-12-04
•
Expires: 1970-08-03
Abstract
No abstract record available.
Inventors
- 👤 Edward A Stalker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:11
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/14; F01D5/18; F01D5/16; Y; Y10; Y10S; Y10S416/00; Y10S416/03; Y10S416/50; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/4932; Y10T29/49321
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1434414A
Cited
GB523038A
Cited
US2181592A
Cited
US2258459A
Cited
US2287853A
Cited
US2405190A
Cited
US2428728A
Cited
US2436087A
Cited
US2573875A
Cited
US2537739A
Cited
US2501038A
Cited
US2649243A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-04 | 1960-06-04 | 1960-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-04 | 1964-06-04 | 1964-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-04 | 1968-06-04 | 1968-12-04 | $7700.00 | Window Closed / Lapsed |