US2456271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reaction product of n-substituted polyamides with hydroxylated materials and process for obtaining same
Assignee: EIDP Inc
•
Filing: 1944-04-06
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Granted: 1948-12-14
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Expires: 1964-04-06
Abstract
No abstract record available.
Inventors
- 👤 Graham Boynton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:50
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/48; C08G69/50; Y; Y10; Y10S; Y10S273/00; Y10S273/06
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) | 1951-12-14 | 1952-06-14 | 1952-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-14 | 1956-06-14 | 1956-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-14 | 1960-06-14 | 1960-12-14 | $7700.00 | Window Closed / Lapsed |