US2902910A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable concrete shaping device
Assignee: Individual
•
Filing: 1956-08-30
•
Granted: 1959-09-08
•
Expires: 1976-08-30
Abstract
No abstract record available.
Inventors
- 👤 William C Malsbury
- 👤 Kenneth C Malsbury
- 👤 William B Malsbury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:13
CPC Classifications
E; E01; E01C; E01C11/00; E01C11/16; E01C11/18; E01C19/00; E01C19/48; E01C19/4886; E01C19/4893
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US723243A
Cited
US1084158A
Cited
US1947754A
Cited
US1965993A
Cited
US2006316A
Cited
US2188553A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-07 | 1963-03-09 | 1963-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-07 | 1967-03-09 | 1967-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-07 | 1971-03-09 | 1971-09-08 | $7700.00 | Window Closed / Lapsed |