Patent US2193567A successfully refreshed from Google Patents.
US2193567A
Expired / Lapsed
US
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Tandem trailer unit
Assignee: WILLAMETTE IRON AND STEEL Corp
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Filing: 1938-10-03
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Granted: 1940-03-12
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Expires: 1958-10-03
Abstract
No abstract record available.
Inventors
- 👤 Robert W Pointer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:28
CPC Classifications
B; B60; B60G; B60G5/00; B60G5/02; B60G11/00; B60G11/32; B60G11/48; B60G11/52
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) | 1943-03-12 | 1943-09-11 | 1944-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-03-12 | 1947-09-11 | 1948-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-03-12 | 1951-09-11 | 1952-03-12 | $7700.00 | Window Closed / Lapsed |