Patent US2998623A successfully refreshed from Google Patents.
US2998623A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cheek plates for mill and calender press rolls
Assignee: Building Products Ltd
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Filing: 1960-02-25
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Granted: 1961-09-05
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Expires: 1980-02-25
Abstract
No abstract record available.
Inventors
- 👤 William A Lawson
- 👤 William W Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:44
CPC Classifications
B; B29; B29B; B29B7/00; B29B7/30; B29B7/58; B29B7/584; B29C; B29C43/00; B29C43/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1341422A
Cited
US1277729A
Cited
US2513541A
Cited
US2599218A
Cited
US2932852A
Cited
US2919466A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-04 | 1965-03-06 | 1965-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-04 | 1969-03-06 | 1969-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-04 | 1973-03-06 | 1973-09-05 | $7700.00 | Window Closed / Lapsed |