Patent US2856668A successfully refreshed from Google Patents.
US2856668A
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Concrete block molding machine
Assignee: DOMINAIRE CONST Inc
•
Filing: 1952-04-22
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Granted: 1958-10-21
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Expires: 1972-04-22
Abstract
No abstract record available.
Inventors
- 👤 Samuel V Cravens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:14
CPC Classifications
B; B28; B28B; B28B7/00; B28B7/02; B28B3/00; B28B3/02; B28B3/022; B28B7/0064; B28B7/0079; B28B7/16; Y; Y10; Y10S; Y10S425/00; Y10S425/117
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) | 1961-10-20 | 1962-04-21 | 1962-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-20 | 1966-04-21 | 1966-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-20 | 1970-04-21 | 1970-10-21 | $7700.00 | Window Closed / Lapsed |