US2280383A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for extracting an auxiliary product of rectification
Assignee: Individual
•
Filing: 1939-09-08
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Granted: 1942-04-21
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Expires: 1959-09-08
Abstract
No abstract record available.
Inventors
- 👤 Baufre William Lane De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:47
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/04; F25J3/04642; F25J3/04648; F25J3/04151; F25J3/04163; F25J3/04169; F25J3/04175; F25J3/04187; F25J3/0423; F25J3/04248; F25J3/04284; F25J3/0429; F25J3/04296; F25J3/04375; F25J3/04381; F25J3/04406; F25J3/04412; F25J3/04654; F25J3/04709; F25J3/04715; F25J2200/00; F25J2200/04; F25J2200/34; F25J2200/50; F25J2200/52; F25J2200/54; F25J2250/00; F25J2250/10; F25J2250/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1945-04-20 | 1945-10-20 | 1946-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-04-20 | 1949-10-20 | 1950-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-04-20 | 1953-10-20 | 1954-04-21 | $7700.00 | Window Closed / Lapsed |