Patent US2820599A successfully refreshed from Google Patents.
US2820599A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual unit jet propulsion plant for aircraft
Assignee: Aktiengesellschaft fuer Technische Studien
•
Filing: 1955-02-03
•
Granted: 1958-01-21
•
Expires: 1975-02-03
Abstract
No abstract record available.
Inventors
- 👤 Ackeret Jakob
- 👤 Keller Curt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:19
CPC Classifications
F; F02; F02K; F02K3/00; F02K3/12; B; B64; B64C; B64C21/00; B64C21/02; B64C21/06; B64C2230/00; B64C2230/04; B64C2230/22; Y; Y02; Y02T; Y02T50/00; Y02T50/10; 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)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-20 | 1961-07-22 | 1962-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-20 | 1965-07-22 | 1966-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-20 | 1969-07-22 | 1970-01-21 | $7700.00 | Window Closed / Lapsed |