Patent US2697263A successfully refreshed from Google Patents.
US2697263A
Expired / Lapsed
US
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Machine for making cementitious blocks
Assignee: Individual
•
Filing: 1948-10-18
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Granted: 1954-12-21
•
Expires: 1968-10-18
Abstract
No abstract record available.
Inventors
- 👤 David M Van Ornum
- 👤 James S Van Ornum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:52
CPC Classifications
B; B28; B28B; B28B1/00; B28B1/08; B28B1/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1884528A
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US1905975A
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US2382458A
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US2431034A
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US2466339A
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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) | 1957-12-20 | 1958-06-21 | 1958-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-20 | 1962-06-21 | 1962-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-20 | 1966-06-21 | 1966-12-21 | $7700.00 | Window Closed / Lapsed |