US2454420A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oleomargarine coloring unit
Assignee: Dyestuffs and Chemicals Inc
•
Filing: 1946-05-17
•
Granted: 1948-11-23
•
Expires: 1966-05-17
Abstract
No abstract record available.
Inventors
- 👤 Adler Leon
- 👤 Harold G Johnson
- 👤 Beeason J Schneider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:51
CPC Classifications
A; A23; A23D; A23D7/00; A23D7/005; A23D7/0056
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1388174A
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US1829947A
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US1921738A
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US1986783A
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US2052175A
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US2042173A
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US2107851A
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US2347640A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-23 | 1952-05-24 | 1952-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-23 | 1956-05-24 | 1956-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-23 | 1960-05-24 | 1960-11-23 | $7700.00 | Window Closed / Lapsed |