US2614312A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of molding tubular concrete articles
Assignee: American Pipe and Construction Co
•
Filing: 1946-06-10
•
Granted: 1952-10-21
•
Expires: 1966-06-10
Abstract
No abstract record available.
Inventors
- 👤 Donald H Rankin
- 👤 Charles E Little
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:16
CPC Classifications
B; B28; B28B; B28B21/00; B28B21/02; B28B21/10; B28B21/14; B28B21/16
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) | 1955-10-21 | 1956-04-21 | 1956-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-21 | 1960-04-21 | 1960-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-21 | 1964-04-21 | 1964-10-21 | $7700.00 | Window Closed / Lapsed |