Patent US1807914A successfully refreshed from Google Patents.
US1807914A
Expired / Lapsed
US
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Lifting jack
Assignee: National Standard Co
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Filing: 1927-05-18
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Granted: 1931-06-02
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Expires: 1947-05-18
Abstract
No abstract record available.
Inventors
- 👤 Arthur C Hopkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:50
CPC Classifications
B; B66; B66F; B66F13/00; B66F13/005; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20396; Y10T74/20402; Y10T74/20444; Y10T74/21; Y10T74/2142
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1934-06-01 | 1934-12-01 | 1935-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-06-01 | 1938-12-01 | 1939-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-06-01 | 1942-12-01 | 1943-06-02 | $7700.00 | Window Closed / Lapsed |