US2704036A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tamping tool
Assignee: W J PROUT
•
Filing: 1951-06-28
•
Granted: 1955-03-15
•
Expires: 1971-06-28
Abstract
No abstract record available.
Inventors
- 👤 Francis C Briggs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:26
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/02; E01; E01B; E01B27/00; E01B27/12; E01B27/13; E01B27/14
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US172263A
Cited
US440933A
Cited
US2016326A
Cited
US1219818A
Cited
US1544370A
Cited
US2247958A
Cited
US2353990A
Cited
US2579258A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-03-14 | 1958-09-13 | 1959-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-03-14 | 1962-09-13 | 1963-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-03-14 | 1966-09-13 | 1967-03-15 | $7700.00 | Window Closed / Lapsed |