US3177694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means of minimizing rib projection on rolled tube
Assignee: Calumet and Hecla Inc
•
Filing: 1960-03-28
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Granted: 1965-04-13
•
Expires: 1980-03-28
Abstract
No abstract record available.
Inventors
- 👤 Frederick E Bialas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:30
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A METHOD OF REDUCING RIB PROJECTION ON THE TUBE HAVING DIAMETRICALLY OPPOSITE LONGITUDINAL RIBS PROJECTING OUTWARDLY FROM THE SURFACE THEREOF, COMPRISING THE STEPS OF REDUCING THE THICKNESS OF SAID RIBS, BY ROLLING, AND THEN LATERALLY BENDING SAID RIBS AND APPLYING A RADIALLY COMPRESSIVE FORCE THEREON TO FLATTEN THE RIBS AGAINST AND AT LEAST PARTIALLY EMBED THE SAME INTO THE SURFACE OF THE TUBE.
Claim 2
Independent Claim
63 words
A METHOD OF REDUCING RIB PROJECTION ON THE TUBE HAVING DIAMETRICALLY OPPOSITE LONGITUDINAL RIBS PROJECTING OUTWARDLY FROM THE SURFACE THEREOF, COMPRISING THE STEPS OF REDUCING THE THICKNESS OF SAID RIBS, BY ROLLING, AND THEN LATERALLY BENDING SAID RIBS AND APPLYING A RADIALLY COMPRESSIVE FORCE THEREON TO FLATTEN THE RIBS AGAINST AND AT LEAST PARTIALLY EMBED THE SAME INTO THE SURFACE OF THE TUBE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-12 | 1968-10-12 | 1969-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-12 | 1972-10-12 | 1973-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-12 | 1976-10-12 | 1977-04-13 | $7700.00 | Window Closed / Lapsed |