US3187536A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary straightener
Assignee: Pritchett Engineering & Machin
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Filing: 1961-11-20
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Granted: 1965-06-08
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Expires: 1981-11-20
Abstract
No abstract record available.
Inventors
- 👤 Michael W Zolton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:44
CPC Classifications
B; B21; B21D; B21D3/00; B21D3/02; B21D3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
APPARATUS FOR STRAIGHTENING CYLINDRICAL MEMEBRS COMPRISING A PLURALITY OF UPPER AND LOWER ROLLS SPACED ALONG THE LINE OF TRAVEL OF THE CYLINDRICAL MEMBER THROUGH THE APPARATUS AND AT AN ANGLE TO SAID LINE OF TRAVEL, WHEREBY SAID MEMBER MAY BE PASSED LONGITUDINALLY BETWEEN AND IN CONTACT WITH EACH OF SAID UPPER AND SAID LOWER ROLLS, EACH OF SAID ROLLS HAVING A CONTOUR WHICH IS GENERALLY IN THE FORM OF A HYPERBOLOID OF ONE SHEET, AND THE
Claim 2
Dependent Claim
76 words
APPARATUS FOR STRAIGHTENING CYLINDRICAL MEMEBRS COMPRISING A PLURALITY OF UPPER AND LOWER ROLLS SPACED ALONG THE LINE OF TRAVEL OF THE CYLINDRICAL MEMBER THROUGH THE APPARATUS AND AT AN ANGLE TO SAID LINE OF TRAVEL, WHEREBY SAID MEMBER MAY BE PASSED LONGITUDINALLY BETWEEN AND IN CONTACT WITH EACH OF SAID UPPER AND SAID LOWER ROLLS, EACH OF SAID ROLLS HAVING A CONTOUR WHICH IS GENERALLY IN THE FORM OF A HYPERBOLOID OF ONE SHEET, AND THE
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) | 1968-06-07 | 1968-12-07 | 1969-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-07 | 1972-12-07 | 1973-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-07 | 1976-12-07 | 1977-06-08 | $7700.00 | Window Closed / Lapsed |