Patent US3530273A successfully refreshed from Google Patents.
US3530273A
Expired / Lapsed
US
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Automatic tracer for positioning control
Assignee: AO Smith Corp
•
Filing: 1969-01-24
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Granted: 1970-09-22
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Expires: 1989-01-24
Abstract
No abstract record available.
Inventors
- 👤 John G Bollinger
- 👤 Howard L Harrison
- 👤 Bjorn Berglund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:49
CPC Classifications
B; B23; B23K; B23K5/00; B23K5/02; B23K5/06; Y; Y10; Y10T; Y10T409/00; Y10T409/30; Y10T409/303416; Y10T409/303472; Y10T409/303528
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3122970A
Cited
US2395525A
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US2827548A
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US2839663A
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US3084246A
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US3199056A
Cited
US3171012A
Cited
US3281047A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-21 | 1974-03-23 | 1974-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-21 | 1978-03-23 | 1978-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-21 | 1982-03-23 | 1982-09-22 | $7700.00 | Window Closed / Lapsed |