US2468808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas blanketed arc welding
Assignee: Linde Air Products Co
•
Filing: 1947-03-12
•
Granted: 1949-05-03
•
Expires: 1967-03-12
Abstract
No abstract record available.
Inventors
- 👤 Francis M Drake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:40
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/24; B23K9/28; B23K9/29; B23K9/291
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE507116C
Cited
US1512789A
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US1707433A
Cited
US1986167A
Cited
US2043960A
Cited
FR863983A
Cited
US2310164A
Cited
US2360160A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-02 | 1952-11-01 | 1953-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-02 | 1956-11-01 | 1957-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-02 | 1960-11-01 | 1961-05-03 | $7700.00 | Window Closed / Lapsed |