Patent US3586619A successfully refreshed from Google Patents.
Patent US2567940A successfully refreshed from Google Patents.
US2567940A
Expired / Lapsed
US
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Process for drying granular, thread, and fibrous materials
Assignee: Individual
•
Filing: 1947-09-20
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Granted: 1951-09-18
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Expires: 1967-09-20
Abstract
No abstract record available.
Inventors
- 👤 Karrer Friedrich Wilhel Johann
- 👤 Rietz Harald Du
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:10
CPC Classifications
F; F26; F26B; F26B9/00; F26B9/10; F26B9/103
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1791038A
Cited
US918335A
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US1629167A
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US1501513A
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US1540926A
Cited
US1637166A
Cited
US2119261A
Cited
US2335553A
Cited
US2440416A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-17 | 1955-03-19 | 1955-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-17 | 1959-03-19 | 1959-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-17 | 1963-03-19 | 1963-09-18 | $7700.00 | Window Closed / Lapsed |