Patent US3421158A successfully refreshed from Google Patents.
US3421158A
Expired / Lapsed
US
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Articulated joint
Assignee: Northrop Grumman Guidance and Electronics Co Inc
•
Filing: 1965-09-10
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Granted: 1969-01-14
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Expires: 1985-09-10
Abstract
No abstract record available.
Inventors
- 👤 Giusto Fonda-Bonardi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:38
CPC Classifications
B; B63; B63C; B63C11/00; B63C11/02; B63C11/10; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19628
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US396773A
Cited
US568537A
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US685628A
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FR402272A
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FR422037A
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US1349060A
Cited
US1383322A
Cited
US1722375A
Cited
US3242499A
Cited
US3236544A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-14 | 1972-07-15 | 1973-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-14 | 1976-07-15 | 1977-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-14 | 1980-07-15 | 1981-01-14 | $7700.00 | Window Closed / Lapsed |