Patent US2930582A successfully refreshed from Google Patents.
US2930582A
Expired / Lapsed
US
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Vertical load suspension and adjusting mechanism
Assignee: Individual
•
Filing: 1957-08-26
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Granted: 1960-03-29
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Expires: 1977-08-26
Abstract
No abstract record available.
Inventors
- 👤 Walter W Foster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:13
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/08; E21B19/086
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE623945C
Cited
US2470074A
Cited
FR1082903A
Cited
US2795935A
Cited
US2795934A
Cited
GB750419A
Cited
FR1126394A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-29 | 1963-09-28 | 1964-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-29 | 1967-09-28 | 1968-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-29 | 1971-09-28 | 1972-03-29 | $7700.00 | Window Closed / Lapsed |