Patent US2688804A successfully refreshed from Google Patents.
US2688804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alignment means for pipe manufacturing apparatus
Assignee: Republic Steel Corp
•
Filing: 1950-05-18
•
Granted: 1954-09-14
•
Expires: 1970-05-18
Abstract
No abstract record available.
Inventors
- 👤 Frederic M Darner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:50
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/08; B21C37/0822
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US458055A
Cited
US1033648A
Cited
US1285328A
Cited
US1452824A
Cited
GB195013A
Cited
US1808816A
Cited
US2000789A
Cited
US2000476A
Cited
US2054359A
Cited
US2268368A
Cited
US2437160A
Cited
US2526723A
Cited
US2595910A
Cited
US2639513A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-13 | 1958-03-15 | 1958-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-13 | 1962-03-15 | 1962-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-13 | 1966-03-15 | 1966-09-14 | $7700.00 | Window Closed / Lapsed |