Patent US3557496A successfully refreshed from Google Patents.
US3557496A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrasive tool
Assignee: ROBERT W MARTI
•
Filing: 1968-07-05
•
Granted: 1971-01-26
•
Expires: 1988-07-05
Abstract
Abstract AN ABRASIVE TOOL FOR USE IN CLEANING OR POLISHING THE INTERIOR AND EXTERIOR SURFACES OF PIPES, TUBES AND THE LIKE TO PREPARE THE SAME FOR SOLDERING, BRAZING OR OTHER OPERATIONS. THE TOOL EMBODIES A FLEXIBLE STRIP OF FLAT MATERIAL PRESENTING AT LEAST ONE ABRASIVE SURFACE AND HAVING HANDLES CONNECTED TO THE OPPOSITE ENDS OF SAID STRIP. THE HANDLES HAVE A GENERALLY CYLINDRICAL OR SLIGHTLY TAPERED FORM AND ARE PROVIDED WITH ABRASIVE SURFACES FOR CLEANING THE INNER SURFACE OF A PIPE TUBE OR FITTINGS.
Inventors
- 👤 Robert W Marti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:33
CPC Classifications
B; B24; B24D; B24D15/00; B24D15/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |