Patent US2985935A successfully refreshed from Google Patents.
US2985935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system for a concrete block forming machine
Assignee: —
•
Filing: —
•
Granted: 1961-05-30
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Expires: 1978-05-30
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:44
CPC Classifications
B; B28; B28B; B28B3/00; B28B3/02; B28B3/022
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2366780A
Cited
US2270829A
Cited
US2308132A
Cited
US2431034A
Cited
US2685116A
Cited
US2697263A
Cited
GB748464A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-29 | 1964-11-28 | 1965-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-29 | 1968-11-28 | 1969-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-29 | 1972-11-28 | 1973-05-30 | $7700.00 | Window Closed / Lapsed |