Patent US2948042A successfully refreshed from Google Patents.
US2948042A
Expired / Lapsed
US
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Apparatus for making hollow reinforced concrete bodies
Assignee: Ben C Gerwick Inc
•
Filing: 1955-03-14
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Granted: 1960-08-09
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Expires: 1975-03-14
Abstract
No abstract record available.
Inventors
- 👤 Kenneth D Sylvester
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:26
CPC Classifications
B; B28; B28B; B28B21/00; B28B21/56; B28B21/60; B28B21/02; B28B21/06
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) | 1963-08-09 | 1964-02-08 | 1964-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-09 | 1968-02-08 | 1968-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-09 | 1972-02-08 | 1972-08-09 | $7700.00 | Window Closed / Lapsed |