US2778099A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of welding and apparatus therefor
Assignee: Airco Inc
•
Filing: 1952-05-15
•
Granted: 1957-01-22
•
Expires: 1972-05-15
Abstract
No abstract record available.
Inventors
- 👤 Nelson E Anderson
- 👤 Lawrence M Layden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:05
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/16; B23K9/167
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US204030A
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US1508711A
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US1644896A
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US2125781A
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US2182575A
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US2280879A
Cited
GB548645A
Cited
US2415542A
Cited
US2444267A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-22 | 1960-07-23 | 1961-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-22 | 1964-07-23 | 1965-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-22 | 1968-07-23 | 1969-01-22 | $7700.00 | Window Closed / Lapsed |