Patent US3002191A successfully refreshed from Google Patents.
US3002191A
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US
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Method of welding pipe
Assignee: Grinnell Corp
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Filing: 1959-02-24
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Granted: 1961-09-26
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Expires: 1979-02-24
Abstract
No abstract record available.
Inventors
- 👤 Helmut J Thielsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:46
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/02; B23K9/028; B23K9/0282
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2731933A
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US1630037A
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US1981850A
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US2040140A
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US2079265A
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US2042100A
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US2463006A
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US2681028A
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US2787699A
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US2792490A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-25 | 1965-03-27 | 1965-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-25 | 1969-03-27 | 1969-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-25 | 1973-03-27 | 1973-09-26 | $7700.00 | Window Closed / Lapsed |