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US3427428A
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US
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Apparatus and method for welding metal pipes and the like
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1965-09-14
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Granted: 1969-02-11
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Expires: 1985-09-14
Abstract
No abstract record available.
Inventors
- 👤 Jerome W Nelson
- 👤 Perry J Rieppel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:29
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/02; B23K9/028; B23K9/0282; B23K9/0286
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2783359A
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US3035156A
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US3009049A
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US3035147A
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US3084246A
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US3042787A
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US3084244A
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US3102187A
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US3116865A
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US3284883A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-11 | 1972-08-12 | 1973-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-11 | 1976-08-12 | 1977-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-11 | 1980-08-12 | 1981-02-11 | $7700.00 | Window Closed / Lapsed |