US2392226A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tension regulating mechanism for differential drives
Assignee: Individual
•
Filing: 1943-08-04
•
Granted: 1946-01-01
•
Expires: 1963-08-04
Abstract
No abstract record available.
Inventors
- 👤 Jr Harry W Butterworth
- 👤 Winfield B Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:11
CPC Classifications
B; B65; B65H; B65H59/00; B65H59/38; B65H59/381; B65H2701/00; B65H2701/30; B65H2701/31
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) | 1948-12-31 | 1949-07-02 | 1950-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-12-31 | 1953-07-02 | 1954-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-12-31 | 1957-07-02 | 1958-01-01 | $7700.00 | Window Closed / Lapsed |