US2589115A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for making concrete blocks
Assignee: Individual
•
Filing: 1948-12-06
•
Granted: 1952-03-11
•
Expires: 1968-12-06
Abstract
No abstract record available.
Inventors
- 👤 Russell B Nelson
- 👤 Davies Miles
- 👤 Neth Fred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:06
CPC Classifications
B; B28; B28B; B28B3/00; B28B3/02; B28B3/022
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US849258A
Cited
US1787449A
Cited
US1862323A
Cited
US2275676A
Cited
US2298446A
Cited
US2382458A
Cited
US2431034A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-11 | 1955-09-10 | 1956-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-11 | 1959-09-10 | 1960-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-11 | 1963-09-10 | 1964-03-11 | $7700.00 | Window Closed / Lapsed |