US2620540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Block making machine
Assignee: Individual
•
Filing: 1948-01-03
•
Granted: 1952-12-09
•
Expires: 1968-01-03
Abstract
No abstract record available.
Inventors
- 👤 Richard L Weir
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:16
CPC Classifications
B; B28; B28B; B28B15/00; B28B15/005; B28B13/00; B28B13/02; B28B13/0215; B28B3/00; B28B3/02; B28B3/022
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1905619A
Cited
US1925050A
Cited
US1796636A
Cited
US1919807A
Cited
US838704A
Cited
US1175011A
Cited
US1237887A
Cited
US1294311A
Cited
US1458551A
Cited
US1400969A
Cited
US1695327A
Cited
US1799923A
Cited
US1777660A
Cited
US1835914A
Cited
US1899277A
Cited
DE586326C
Cited
US2070720A
Cited
US2047356A
Cited
US2062196A
Cited
US2366780A
Cited
US2136009A
Cited
US2413109A
Cited
US2360122A
Cited
US2400631A
Cited
US2524359A
Cited
US2492297A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-09 | 1956-06-09 | 1956-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-09 | 1960-06-09 | 1960-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-09 | 1964-06-09 | 1964-12-09 | $7700.00 | Window Closed / Lapsed |