US2810946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concrete block splitting machine
Assignee: CHARLES L MATSON
•
Filing: 1955-06-16
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Granted: 1957-10-29
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Expires: 1975-06-16
Abstract
No abstract record available.
Inventors
- 👤 Garnich Kathryn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:23
CPC Classifications
B; B28; B28B; B28B7/00; B28B7/14; B28B17/00; B28B17/0027; B28B7/10; Y; Y10; Y10S; Y10S425/00; Y10S425/109
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-28 | 1961-04-29 | 1961-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-28 | 1965-04-29 | 1965-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-28 | 1969-04-29 | 1969-10-29 | $7700.00 | Window Closed / Lapsed |