US2550495A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas blanketed arc welding
Assignee: Union Carbide Corp
•
Filing: 1947-02-28
•
Granted: 1951-04-24
•
Expires: 1967-02-28
Abstract
No abstract record available.
Inventors
- 👤 Frank J Pilia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:14
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/007
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US363320A
Cited
US1359620A
Cited
US1749765A
Cited
US1869328A
Cited
US1967728A
Cited
US2093821A
Cited
US2019027A
Cited
US2219352A
Cited
US2274631A
Cited
US2314628A
Cited
US2315502A
Cited
US2378707A
Cited
US2360160A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-23 | 1954-10-23 | 1955-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-23 | 1958-10-23 | 1959-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-23 | 1962-10-23 | 1963-04-24 | $7700.00 | Window Closed / Lapsed |