Patent US2928236A successfully refreshed from Google Patents.
US2928236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rocket engine injector
Assignee: Individual
•
Filing: 1957-01-14
•
Granted: 1960-03-15
•
Expires: 1977-01-14
Abstract
No abstract record available.
Inventors
- 👤 Hartmann J Kircher
- 👤 Lehrer Stanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:02
CPC Classifications
F; F02; F02K; F02K9/00; F02K9/42; F02K9/44; F02K9/52
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2733570A
Cited
US2482260A
Cited
US2706887A
Cited
US2575070A
Cited
US2753687A
Cited
US2682747A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-15 | 1963-09-14 | 1964-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-15 | 1967-09-14 | 1968-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-15 | 1971-09-14 | 1972-03-15 | $7700.00 | Window Closed / Lapsed |