Patent US6169484B1 successfully refreshed from Google Patents.
US2961731A
Expired / Lapsed
US
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Means and method for molding concrete sections of hydraulic concrete structures
Assignee: Individual
•
Filing: 1953-02-20
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Granted: 1960-11-29
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Expires: 1973-02-20
Abstract
No abstract record available.
Inventors
- 👤 Dow A Buzzell
- 👤 Ralph L Bloor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:37
CPC Classifications
E; E02; E02B; E02B7/00; E02B7/02; E02B7/04; E02B7/08; E02B7/10; Y; Y10; Y10S; Y10S264/00; Y10S264/57
Claims Analysis
Total Claims: 0
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US2431104A
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US2493264A
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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) | 1963-11-29 | 1964-05-30 | 1964-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-29 | 1968-05-30 | 1968-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-29 | 1972-05-30 | 1972-11-29 | $7700.00 | Window Closed / Lapsed |