US2539404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid propellant charge for rocket motors
Assignee: Aerojet Rocketdyne Inc
•
Filing: 1945-05-28
•
Granted: 1951-01-30
•
Expires: 1965-05-28
Abstract
No abstract record available.
Inventors
- 👤 Leslie M Crutchfield
- 👤 Jr William E Campbell
- 👤 Harry W Mace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:58
CPC Classifications
F; F02; F02K; F02K9/00; F02K9/08; F02K9/32; F02K9/34; F02K9/346
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US778788A
Cited
US892757A
Cited
US958990A
Cited
GB191503133A
Cited
FR502560A
Cited
US2043268A
Cited
US2446560A
Cited
US2440305A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-29 | 1954-07-31 | 1955-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-29 | 1958-07-31 | 1959-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-29 | 1962-07-31 | 1963-01-30 | $7700.00 | Window Closed / Lapsed |