US2869213A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gasket sealed concrete pipe form
Assignee: Cretex Companies Inc
•
Filing: 1955-12-02
•
Granted: 1959-01-20
•
Expires: 1975-12-02
Abstract
No abstract record available.
Inventors
- 👤 Richard C Longfellow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:23
CPC Classifications
B; B28; B28B; B28B7/00; B28B7/0002; B28B7/0011; B28B21/00; B28B21/76; B28B7/0014
Claims Analysis
Total Claims: 0
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US2502789A
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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) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |