US3444349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Welding apparatus
Assignee: Chicago Bridge and Iron Co
•
Filing: 1966-06-03
•
Granted: 1969-05-13
•
Expires: 1986-06-03
Abstract
No abstract record available.
Inventors
- 👤 Carl Max Rainey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:11
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/02; B23K9/038; B23K9/0209
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2331937A
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US2678987A
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US2997571A
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US3046386A
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US3170430A
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US3211887A
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US3251526A
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US3229068A
Cited
US3229884A
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US3219250A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-12 | 1972-11-11 | 1973-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-12 | 1976-11-11 | 1977-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-12 | 1980-11-11 | 1981-05-13 | $7700.00 | Window Closed / Lapsed |