US2320700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Backup ring or sleeve for welding
Assignee: Crane Co
•
Filing: 1940-11-28
•
Granted: 1943-06-01
•
Expires: 1960-11-28
Abstract
No abstract record available.
Inventors
- 👤 Charles E Kent
- 👤 Otto M Carlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:11
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/02; B23K9/035; B23K9/0358
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1946-05-31 | 1946-11-30 | 1947-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-05-31 | 1950-11-30 | 1951-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-05-31 | 1954-11-30 | 1955-06-01 | $7700.00 | Window Closed / Lapsed |