US3335596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods and apparatus for manufacture of h-section steel having surface projections
Assignee: Fuji Iron and Steel Co Ltd
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Filing: 1964-09-25
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Granted: 1967-08-15
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Expires: 1984-09-25
Abstract
No abstract record available.
Inventors
- 👤 Noda Iknya
- 👤 Kato Kimihiro
- 👤 Yamamoto Akira
- 👤 Okano Katsutoshi
- 👤 Ueta Takashi
- 👤 Minami Hisao
- 👤 Hirano Ryo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:54
CPC Classifications
B; B21; B21B; B21B1/00; B21B1/08; B21B1/088; B21H; B21H8/00; B21B2001/081; B21B45/00; B21B45/02; B21B45/0203; B21B45/0209; B21B2045/0212; B21B45/0215; B21B2045/0221
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
160 words
A METHOD OF MANUFACTURING A STEEL H-SECTION INCLUDING A PAIR OF FLANGES INTERCONNECTED BY A WEB AND HAVING PROJECTIONS ON THE OUTER SURFACE OF AT LEAST ONE FLANGE, THE PROJECTIONS BEING UNIFORM IN HEIGHT AND CONFIGURATION, SAID METHOD COMPRISING THE STEPS OF: ROUGH ROLLING A STEEL INGOT TO PRODUCE H-CROSS SECTION BEAM INCLUDING A PAIR OF FLANGES INTERCONNECTED BY A WEB AT JUNCTURES BETWEEN THE WEB AND THE FLANGES; DURING THE ROUGH ROLLING, SUBJECTING THE WEB TO TREATMENT TO INCREASE ITS RESISTANCE TO DEFORMATION UNDER PRESSURE APPLIED TO THE OUTER SURFACES OF THE FLANGES; AND FINISH ROLLING THE ROUGH-ROLLED H-BEAM USING ROLLS PRESSING AGAINST THE OUTER SURFACES OF THE FLANGES AND AT LEAST ONE HAVING A ROLLING SURFACE RECESSED TO FORM SAID PROJECTIONS; THE INCREASED RESISTANCE TO DEFORMATION OF THE WEB ASSURING THOSE PROJECTIONS ADJACENT A JUNCTURE OF THE WEB WITH THE FLANGES BEING UNIFORM IN HEIGHT AND CONFIGURATION WITH THE REMAINDER OF THE PROJECTIONS FORMED ON THE SAME SURFACE.
Claim 2
Independent Claim
160 words
A METHOD OF MANUFACTURING A STEEL H-SECTION INCLUDING A PAIR OF FLANGES INTERCONNECTED BY A WEB AND HAVING PROJECTIONS ON THE OUTER SURFACE OF AT LEAST ONE FLANGE, THE PROJECTIONS BEING UNIFORM IN HEIGHT AND CONFIGURATION, SAID METHOD COMPRISING THE STEPS OF: ROUGH ROLLING A STEEL INGOT TO PRODUCE H-CROSS SECTION BEAM INCLUDING A PAIR OF FLANGES INTERCONNECTED BY A WEB AT JUNCTURES BETWEEN THE WEB AND THE FLANGES; DURING THE ROUGH ROLLING, SUBJECTING THE WEB TO TREATMENT TO INCREASE ITS RESISTANCE TO DEFORMATION UNDER PRESSURE APPLIED TO THE OUTER SURFACES OF THE FLANGES; AND FINISH ROLLING THE ROUGH-ROLLED H-BEAM USING ROLLS PRESSING AGAINST THE OUTER SURFACES OF THE FLANGES AND AT LEAST ONE HAVING A ROLLING SURFACE RECESSED TO FORM SAID PROJECTIONS; THE INCREASED RESISTANCE TO DEFORMATION OF THE WEB ASSURING THOSE PROJECTIONS ADJACENT A JUNCTURE OF THE WEB WITH THE FLANGES BEING UNIFORM IN HEIGHT AND CONFIGURATION WITH THE REMAINDER OF THE PROJECTIONS FORMED ON THE SAME SURFACE.
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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) | 1970-08-14 | 1971-02-13 | 1971-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-14 | 1975-02-13 | 1975-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-14 | 1979-02-13 | 1979-08-15 | $7700.00 | Window Closed / Lapsed |