US2669420A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Turbine structure
Assignee: MW Kellogg Co
•
Filing: 1948-07-03
•
Granted: 1954-02-16
•
Expires: 1968-07-03
Abstract
No abstract record available.
Inventors
- 👤 Hans T Holzwarth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:16
CPC Classifications
F; F01; F01D; F01D25/00; F01D25/18; F01D5/00; F01D5/02; F01D5/08; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1880747A
Cited
US1769136A
Cited
US1859068A
Cited
DE557860C
Cited
US1960810A
Cited
US2073605A
Cited
US2243467A
Cited
US2174854A
Cited
GB512301A
Cited
US2296701A
Cited
US2440890A
Cited
US2401826A
Cited
US2414788A
Cited
US2462600A
Cited
US2427614A
Cited
US2382564A
Cited
US2440069A
Cited
FR919016A
Cited
US2440933A
Cited
US2492672A
Cited
US2445837A
Cited
US2483616A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-15 | 1957-08-17 | 1958-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-15 | 1961-08-17 | 1962-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-15 | 1965-08-17 | 1966-02-16 | $7700.00 | Window Closed / Lapsed |