US3247581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming a conduit bend
Assignee: Calumet and Hecla Inc
•
Filing: 1962-02-05
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Granted: 1966-04-26
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Expires: 1982-02-05
Abstract
No abstract record available.
Inventors
- 👤 Frank L Pellizzari
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:15
CPC Classifications
F; F16; F16L; F16L43/00; F16L43/001; B; B21; B21C; B21C37/00; B21C37/06; B21C37/15; B21C37/28; B21D; B21D9/00; B21D9/14; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49428; Y10T29/49444; Y10T29/49805
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
THE METHOD OF FORMING A CONDUIT FITTING WHICH COMPRISES THE STEPS OF: (A) BENDING A TUBULAR ELEMENT HAVING AXIALLY DISPLACED, CIRCUMFERENTIAL CORRUGATIONS, IN THE VICINITY OF THE CORRUGATIONS THEREOF; AND (B) RADIALLY EXPANDING SAID ELEMENT IN A CONFINING DIE TO SMOOTH OUT SAID CORRUGATIONS.
Claim 2
Independent Claim
44 words
THE METHOD OF FORMING A CONDUIT FITTING WHICH COMPRISES THE STEPS OF: (A) BENDING A TUBULAR ELEMENT HAVING AXIALLY DISPLACED, CIRCUMFERENTIAL CORRUGATIONS, IN THE VICINITY OF THE CORRUGATIONS THEREOF; AND (B) RADIALLY EXPANDING SAID ELEMENT IN A CONFINING DIE TO SMOOTH OUT SAID CORRUGATIONS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |