US2807972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple unit assembly for rotary tools
Assignee: Thor Power Tool Co
•
Filing: 1956-02-14
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Granted: 1957-10-01
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Expires: 1976-02-14
Abstract
No abstract record available.
Inventors
- 👤 Walter G Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:43
CPC Classifications
B; B23; B23P; B23P19/00; B23P19/04; B23P19/06; B23P19/069; B23B; B23B39/00; B23B39/16; B23Q; B23Q11/00; B23Q11/0078; B23Q11/0096; B23Q11/12; B23Q11/121; B23Q11/123; B23Q37/00; B23Q5/00; B23Q5/02; B23Q5/04; B23Q5/06; B25; B25B; B25B21/00; B25B21/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2069882A
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US2219484A
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US2266302A
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US2681668A
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US2691314A
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US2651228A
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US2649870A
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US2742807A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-30 | 1961-04-01 | 1961-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-30 | 1965-04-01 | 1965-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-30 | 1969-04-01 | 1969-10-01 | $7700.00 | Window Closed / Lapsed |