US2585756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for forming concrete pipes
Assignee: Individual
•
Filing: 1947-08-11
•
Granted: 1952-02-12
•
Expires: 1967-08-11
Abstract
No abstract record available.
Inventors
- 👤 Hector X Eschenbrenner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:00
CPC Classifications
B; B28; B28B; B28B21/00; B28B21/02; B28B21/10; B28B21/22; B28B21/14; B28B21/16; B28B21/36; B28B21/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2536364A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-11 | 1955-08-13 | 1956-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-11 | 1959-08-13 | 1960-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-11 | 1963-08-13 | 1964-02-12 | $7700.00 | Window Closed / Lapsed |