Patent US2420022A successfully refreshed from Google Patents.
US2420022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of anthrimides
Assignee: EIDP Inc
•
Filing: 1944-05-09
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Granted: 1947-05-06
•
Expires: 1964-05-09
Abstract
No abstract record available.
Inventors
- 👤 Tinker John Marlin
- 👤 Stallmann Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:28
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/16; C09B1/20; C09B1/48
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE262788C
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DE208162C
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GB191009219A
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US1401678A
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US1530949A
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US1656575A
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US2028103A
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US2153300A
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US2151635A
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US2301286A
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US2152186A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-05 | 1950-11-04 | 1951-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-05 | 1954-11-04 | 1955-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-05 | 1958-11-04 | 1959-05-06 | $7700.00 | Window Closed / Lapsed |