US2843020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zero-length launcher
Assignee: Northrop Grumman Corp
•
Filing: 1953-06-22
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Granted: 1958-07-15
•
Expires: 1973-06-22
Abstract
No abstract record available.
Inventors
- 👤 Victor B Bertagna
- 👤 John J Pfarr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:22
CPC Classifications
B; B64; B64F; B64F1/00; B64F1/04; B64F1/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2735391A
Cited
US1045075A
Cited
FR864212A
Cited
FR1009822A
Cited
GB688378A
Cited
US2604014A
Cited
US2729406A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-14 | 1962-01-13 | 1962-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-14 | 1966-01-13 | 1966-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-14 | 1970-01-13 | 1970-07-15 | $7700.00 | Window Closed / Lapsed |