Patent US3280712A successfully refreshed from Google Patents.
US3280712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tamping device
Assignee: Individual
•
Filing: 1963-10-03
•
Granted: 1966-10-25
•
Expires: 1983-10-03
Abstract
No abstract record available.
Inventors
- 👤 Beierlein Bernhard
- 👤 Beierlein Ullrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:34
CPC Classifications
E; E01; E01C; E01C19/00; E01C19/22; E01C19/23; E01C19/28; E01C19/282; E01C19/283
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A TAMPING ROLLER UNIT COMPRISING, IN COMBINATION: (A) AT LEAST ONE FRONT ROLER; (B) AT LEAST ONE REAR ROLLER; (C) A RIGID FRAME MEMBER MOUNTING SAID ROLLERS IN SPACED PARALLEL RELATIONSHIP, SAID FRAME MEMBER HAVING UPWARDLY DIRECTED EXTENSIONS WHOSE TOPS ARE WITHIN THE SPACE BOUNDED BY VERTICAL PLANES PASSING, RESPECTIVELY, THROUGH THE AXES OF SAID ROLLERS;
Claim 2
Dependent Claim
56 words
A TAMPING ROLLER UNIT COMPRISING, IN COMBINATION: (A) AT LEAST ONE FRONT ROLER; (B) AT LEAST ONE REAR ROLLER; (C) A RIGID FRAME MEMBER MOUNTING SAID ROLLERS IN SPACED PARALLEL RELATIONSHIP, SAID FRAME MEMBER HAVING UPWARDLY DIRECTED EXTENSIONS WHOSE TOPS ARE WITHIN THE SPACE BOUNDED BY VERTICAL PLANES PASSING, RESPECTIVELY, THROUGH THE AXES OF SAID ROLLERS;
References Cited (Backward Citations)
US1532843A
Cited
US1650574A
Cited
US2039078A
Cited
US2113862A
Cited
US3000278A
Cited
GB889747A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-24 | 1970-04-25 | 1970-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-24 | 1974-04-25 | 1974-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-24 | 1978-04-25 | 1978-10-25 | $7700.00 | Window Closed / Lapsed |