Patent US3989441A successfully refreshed from Google Patents.
US3989441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expansion shim for hot briquette roll segments
Assignee: United States Steel Corp
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Filing: 1975-08-06
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Granted: 1976-11-02
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Expires: 1995-08-06
Abstract
Abstract A shim designed for insertion between mold segments on hot briquette rolls permits accurate alignment of the segments and at the same time, by virtue of its softening and melting temperatures permits uniform expansion of the segments on heating.
Inventors
- 👤 William L. Lauterbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:44
CPC Classifications
B; B30; B30B; B30B11/00; B30B11/16; B30B11/165; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53104
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
33 words
A hot briquette roll comprising a roll core, mold segments on the circumference thereof, said mold segments spaced to provide expansion gaps, and shims of a low melting alloy in the expansion gaps.
Claim 2
Dependent Claim
33 words
A hot briquette roll comprising a roll core, mold segments on the circumference thereof, said mold segments spaced to provide expansion gaps, and shims of a low melting alloy in the expansion gaps.
Claim 3
Dependent Claim
21 words
The briquette roll of claim 1 in which the melting point of the shims is between about 550° and 700° F.
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) | 1979-11-02 | 1980-05-03 | 1980-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-02 | 1984-05-03 | 1984-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-02 | 1988-05-03 | 1988-11-02 | $7700.00 | Window Closed / Lapsed |