US2947230A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bituminous paver
Assignee: Poor and Co
•
Filing: 1957-02-21
•
Granted: 1960-08-02
•
Expires: 1977-02-21
Abstract
No abstract record available.
Inventors
- 👤 Ralph W Heer
- 👤 Lloyd W Mundy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:44
CPC Classifications
E; E01; E01C; E01C19/00; E01C19/48; E01C19/4833; E01C19/4853; E01C19/486
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1591593A
Cited
US2012784A
Cited
US2180198A
Cited
US2351592A
Cited
US2351593A
Cited
US2473961A
Cited
US2847917A
Cited
US2890632A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-02 | 1964-02-01 | 1964-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-02 | 1968-02-01 | 1968-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-02 | 1972-02-01 | 1972-08-02 | $7700.00 | Window Closed / Lapsed |