US2620772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable ratio booster
Assignee: Lockheed Martin Corp
•
Filing: 1949-03-04
•
Granted: 1952-12-09
•
Expires: 1969-03-04
Abstract
No abstract record available.
Inventors
- 👤 Philip W Mclane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:03
CPC Classifications
B; B64; B64C; B64C13/00; B64C13/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US242901A
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GB130213A
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US1365347A
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US1869698A
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FR747960A
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US2215423A
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US2366382A
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US2284298A
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US2337706A
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US2380705A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-09 | 1956-06-09 | 1956-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-09 | 1960-06-09 | 1960-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-09 | 1964-06-09 | 1964-12-09 | $7700.00 | Window Closed / Lapsed |