US2673276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Post heating of electrically welded tubes in line of production
Assignee: Babcock and Wilcox Co
•
Filing: 1951-02-01
•
Granted: 1954-03-23
•
Expires: 1971-02-01
Abstract
No abstract record available.
Inventors
- 👤 Ernst W Allardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:57
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/50; B; B21; B21C; B21C37/00; B21C37/06; B21C37/08; B21C37/0807; Y; Y10; Y10T; Y10T29/00; Y10T29/51; Y10T29/5197
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1893926A
Cited
US2047254A
Cited
US2265129A
Cited
US2464402A
Cited
US2460687A
Cited
US2475348A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-22 | 1957-09-21 | 1958-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-22 | 1961-09-21 | 1962-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-22 | 1965-09-21 | 1966-03-23 | $7700.00 | Window Closed / Lapsed |