US2620669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compensated gyro-vertical
Assignee: Unisys Corp
•
Filing: 1946-11-23
•
Granted: 1952-12-09
•
Expires: 1966-11-23
Abstract
No abstract record available.
Inventors
- 👤 Frederick D Braddon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:04
CPC Classifications
G; G01; G01C; G01C19/00; G01C19/02; G01C19/44; Y; Y10; Y10T; Y10T74/00; Y10T74/12; Y10T74/1221; Y10T74/1229; Y10T74/1232; Y10T74/1243; Y10T74/125
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2137974A
Cited
US2188606A
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US2427158A
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US2419063A
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US2380941A
Cited
US2504604A
Cited
US2501885A
Cited
US2530154A
Cited
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 |