US2875985A
Expired / Lapsed
US
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Heat exchange roll
Assignee: Farrel Birmingham Co Inc
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Filing: 1957-10-30
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Granted: 1959-03-03
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Expires: 1977-10-30
Abstract
No abstract record available.
Inventors
- 👤 Hold Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:02
CPC Classifications
B; B29; B29C; B29C33/00; B29C33/02; B29C33/04; B29C33/044; B21; B21B; B21B27/00; B21B27/06; B21B27/08; B29B; B29B7/00; B29B7/30; B29B7/58; B29B7/62; B29B7/625; F; F28; F28F; F28F5/00; F28F5/02; Y; Y10; Y10S; Y10S165/00; Y10S165/135; Y10S165/139; Y10S165/156; Y10S165/159; Y10S165/16; Y10S165/161
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) | 1962-03-02 | 1962-09-01 | 1963-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-02 | 1966-09-01 | 1967-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-02 | 1970-09-01 | 1971-03-03 | $7700.00 | Window Closed / Lapsed |