Patent US2533972A successfully refreshed from Google Patents.
US2533972A
Expired / Lapsed
US
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Towing device
Assignee: Individual
•
Filing: 1946-08-10
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Granted: 1950-12-12
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Expires: 1966-08-10
Abstract
No abstract record available.
Inventors
- 👤 Ralph F Symonds
- 👤 Magnusson Magnus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:10
CPC Classifications
B; B63; B63B; B63B35/00; B63B35/14; B63B35/16; A; A01; A01K; A01K73/00; A01K73/02; A01K73/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-11 | 1954-06-12 | 1954-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-11 | 1958-06-12 | 1958-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-11 | 1962-06-12 | 1962-12-12 | $7700.00 | Window Closed / Lapsed |