US2093284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Work engagement means for jacks
Assignee: Blackhawk Manufacturing Co
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Filing: 1936-06-27
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Granted: 1937-09-14
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Expires: 1956-06-27
Abstract
No abstract record available.
Inventors
- 👤 Mandl Sigmund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:13
CPC Classifications
B; B66; B66F; B66F3/00; B66F3/08; E; E21; E21D; E21D15/00; E21D15/50; E21D15/54; Y; Y10; Y10S; Y10S411/00; Y10S411/90; Y10S411/901; Y10S411/902; Y10S72/00; Y10S72/705; Y10T; Y10T24/00; Y10T24/44; Y10T24/44641; Y10T24/44932
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) | 1940-09-13 | 1941-03-15 | 1941-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-09-13 | 1945-03-15 | 1945-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-09-13 | 1949-03-15 | 1949-09-14 | $7700.00 | Window Closed / Lapsed |