Patent US2674380A successfully refreshed from Google Patents.
Patent US2521335A successfully refreshed from Google Patents.
US2521335A
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Front-wheel suspension
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1947-10-24
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Granted: 1950-09-05
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Expires: 1967-10-24
Abstract
No abstract record available.
Inventors
- 👤 James H Booth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:46
CPC Classifications
F; F16; F16C; F16C11/00; F16C11/04; F16C11/06; F16C11/0604; B; B60; B60G; B60G7/00; B60G7/005; B60G7/04; B60G2200/00; B60G2200/10; B60G2200/14; B60G2200/144; B60G2200/40; B60G2200/44; B60G2202/00; B60G2202/10; B60G2202/12; B60G2204/00; B60G2204/40; B60G2204/45; B60G2204/4502; F16C2326/00; F16C2326/01; F16C2326/05; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32606; Y10T403/32631; Y10T403/32681; Y10T403/32737; Y10T403/32762
Claims Analysis
Total Claims: 0
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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) | 1953-09-04 | 1954-03-06 | 1954-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-04 | 1958-03-06 | 1958-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-04 | 1962-03-06 | 1962-09-05 | $7700.00 | Window Closed / Lapsed |