Patent US2919741A successfully refreshed from Google Patents.
US2919741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cold pipe expanding apparatus
Assignee: Blaw Knox Co
•
Filing: 1955-09-22
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Granted: 1960-01-05
•
Expires: 1975-09-22
Abstract
No abstract record available.
Inventors
- 👤 Donald V Strock
- 👤 George E Moore
- 👤 Albert T Schmidt
- 👤 Joseph P Wadleck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:23
CPC Classifications
B; B21; B21D; B21D41/00; B21D41/02; B21C; B21C37/00; B21C37/06; B21C37/30
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-04 | 1963-07-06 | 1964-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-04 | 1967-07-06 | 1968-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-04 | 1971-07-06 | 1972-01-05 | $7700.00 | Window Closed / Lapsed |