Patent US2204934A successfully refreshed from Google Patents.
US2204934A
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US
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Detachable and flexible tension riding rollers
Assignee: Individual
•
Filing: 1939-02-06
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Granted: 1940-06-18
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Expires: 1959-02-06
Abstract
No abstract record available.
Inventors
- 👤 Conrad F Johnsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:55
CPC Classifications
B; B65; B65H; B65H18/00; B65H18/08; B65H18/26; B65H27/00; B65H2301/00; B65H2301/40; B65H2301/41; B65H2301/413; B65H2301/4134; B65H2301/41342; B65H2301/414; B65H2301/4148; B65H2301/41486; B65H2301/414866; B65H2404/00; B65H2404/10; B65H2404/11; B65H2404/114; B65H2404/18; B65H2404/185; B65H2404/40; B65H2404/43
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) | 1943-06-18 | 1943-12-18 | 1944-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-06-18 | 1947-12-18 | 1948-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-06-18 | 1951-12-18 | 1952-06-18 | $7700.00 | Window Closed / Lapsed |