Patent US3528162A successfully refreshed from Google Patents.
US3528162A
Expired / Lapsed
US
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Method of forming a wound tubular member
Assignee: Mitsubishi Heavy Industries Ltd
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Filing: 1967-09-13
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Granted: 1970-09-15
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Expires: 1987-09-13
Abstract
Abstract Apparatus for spirally winding strip metal comprising a pressure roll for urging the strip metal into a coil, feed rolls for feeding the strip material to the pressure roll and combining with the pressure roll to increase the radius of the strip material immediately preceding its application to the coil, and means for supporting the coil as it is wound and for maintaining the coil in contact with the pressure roll.
Inventors
- 👤 Hideo Sagara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:22
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/08; B21C37/0815; B01; B01J; B01J3/00; B01J3/04; B01J3/048; B21D; B21D51/00; B21D51/16; B21D51/24; F; F16; F16L; F16L9/00; F16L9/16; F16L9/165
Claims Analysis
Total Claims: 0
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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) | 1973-09-14 | 1974-03-16 | 1974-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-14 | 1978-03-16 | 1978-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-14 | 1982-03-16 | 1982-09-15 | $7700.00 | Window Closed / Lapsed |