US2958509A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power balancer
Assignee: Thor Power Tool Co
•
Filing: 1953-02-20
•
Granted: 1960-11-01
•
Expires: 1973-02-20
Abstract
No abstract record available.
Inventors
- 👤 Walter G Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:38
CPC Classifications
B; B66; B66D; B66D3/00; B66D3/18; B66D3/20; B66D3/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US966601A
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GB297273A
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US2072582A
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US2094182A
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DE717181C
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US2254935A
Cited
US2457930A
Cited
US2574131A
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US2600887A
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US2680004A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-01 | 1964-05-02 | 1964-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-01 | 1968-05-02 | 1968-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-01 | 1972-05-02 | 1972-11-01 | $7700.00 | Window Closed / Lapsed |