US3479479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quick-change tool for spark cutting apparatus
Assignee: Individual
•
Filing: 1966-06-20
•
Granted: 1969-11-18
•
Expires: 1986-06-20
Abstract
No abstract record available.
Inventors
- 👤 Thomas J O'connor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:19
CPC Classifications
B; B23; B23H; B23H7/00; B23H7/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US648571A
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GB856340A
Cited
US2903557A
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FR1220607A
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US3067317A
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US2974215A
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US3115454A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-17 | 1973-05-19 | 1973-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-17 | 1977-05-19 | 1977-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-17 | 1981-05-19 | 1981-11-18 | $7700.00 | Window Closed / Lapsed |