US2430875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Granular n-substituted polyamides
Assignee: EIDP Inc
•
Filing: 1944-02-09
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Granted: 1947-11-18
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Expires: 1964-02-09
Abstract
No abstract record available.
Inventors
- 👤 Alban T Hallowell
- 👤 Henry D Foster
- 👤 Arthur W Larchar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:54
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/12; C08J3/14; C08J2377/00
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) | 1950-11-17 | 1951-05-19 | 1951-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-11-17 | 1955-05-19 | 1955-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-11-17 | 1959-05-19 | 1959-11-18 | $7700.00 | Window Closed / Lapsed |