Patent US1261531A successfully refreshed from Google Patents.
US1261531A
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US
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Controlling device for jacks.
Assignee: DUFF Manufacturing CO
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Filing: 1917-12-06
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Granted: 1918-04-02
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Expires: 1937-12-06
Abstract
No abstract record available.
Inventors
- 👤 Isaiah E Hindman
- 👤 John Van Hamersveld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:02
CPC Classifications
B; B66; B66F; B66F3/00; B66F3/08; B66F3/16; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/18576; Y10T74/18696; Y10T74/19; Y10T74/19642; Y10T74/19698; Y10T74/19702; Y10T74/19721
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) | 1921-04-01 | 1921-10-01 | 1922-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1925-04-01 | 1925-10-01 | 1926-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1929-04-01 | 1929-10-01 | 1930-04-02 | $7700.00 | Window Closed / Lapsed |