Patent US1331590A successfully refreshed from Google Patents.
Patent US2698891A successfully refreshed from Google Patents.
US2698891A
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Welding method and welding tool
Assignee: Graver Energy Systems Inc
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Filing: 1952-07-01
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Granted: 1955-01-04
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Expires: 1972-07-01
Abstract
No abstract record available.
Inventors
- 👤 Amel R Meyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:43
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/02; B23K9/0206
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1100654A
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US1271428A
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US1543843A
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US2158675A
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US2294439A
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US2472513A
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US2534679A
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US2529812A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-03 | 1958-07-05 | 1959-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-03 | 1962-07-05 | 1963-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-03 | 1966-07-05 | 1967-01-04 | $7700.00 | Window Closed / Lapsed |