Patent US2575590A successfully refreshed from Google Patents.
US2575590A
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Calender roll pressure control apparatus
Assignee: Wingfoot Corp
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Filing: 1949-08-31
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Granted: 1951-11-20
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Expires: 1969-08-31
Abstract
No abstract record available.
Inventors
- 👤 Jr Albert Goulding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:18
CPC Classifications
B; B29; B29C; B29C43/00; B29C43/22; B29C43/24; B21; B21B; B21B31/00; B21B31/16; B21B31/20; B21B31/22; B21B31/30; B23; B23Q; B23Q1/00; B23Q1/25; B23Q1/44; B23Q1/56; B23Q1/58; B29B; B29B7/00; B29B7/30; B29B7/58; B29B7/68; F; F16; F16P; F16P5/00; F16P5/005; Y; Y10; Y10S; Y10S425/00; Y10S425/235
Claims Analysis
Total Claims: 0
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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) | 1954-11-19 | 1955-05-21 | 1955-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-19 | 1959-05-21 | 1959-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-19 | 1963-05-21 | 1963-11-20 | $7700.00 | Window Closed / Lapsed |