Patent US1640891A successfully refreshed from Google Patents.
US1640891A
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Guide body for reaction rotors
Assignee: Individual
•
Filing: 1925-09-23
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Granted: 1927-08-30
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Expires: 1945-09-23
Abstract
No abstract record available.
Inventors
- 👤 Fritzel Hugo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:24
CPC Classifications
B; B63; B63H; B63H9/00; B63H9/02; B63H25/00; B63H25/06; B63H25/38; B63H25/40; B63B; B63B39/00; B63B39/06; B63B2039/066; B63H1/00; B63H2001/005; Y; Y02; Y02T; Y02T70/00; Y02T70/50; Y02T70/5218; Y02T70/5236; Y10; Y10S; Y10S415/00; Y10S415/905; Y10S415/907
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) | 1930-08-29 | 1931-02-28 | 1931-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1934-08-29 | 1935-02-28 | 1935-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1938-08-29 | 1939-02-28 | 1939-08-30 | $7700.00 | Window Closed / Lapsed |