US2273040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical process and product
Assignee: EIDP Inc
•
Filing: 1940-09-26
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Granted: 1942-02-17
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Expires: 1960-09-26
Abstract
No abstract record available.
Inventors
- 👤 Ralph K Iler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:20
CPC Classifications
C; C07; C07C; C07C53/00; C07C53/126; C04; C04B; C04B41/00; C04B41/45; C04B41/46; C04B41/50; C14; C14C; C14C3/00; C14C3/02; C14C3/04; C14C3/06; D; D06; D06M; D06M13/00; D06M13/10; D06M13/184; D06M13/188; D21; D21H; D21H17/00; D21H17/03; D21H17/05; D21H17/12; Y; Y10; Y10S; Y10S210/00; Y10S210/918; Y10S210/922; Y10S210/925; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31971
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) | 1945-02-16 | 1945-08-18 | 1946-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-02-16 | 1949-08-18 | 1950-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-02-16 | 1953-08-18 | 1954-02-17 | $7700.00 | Window Closed / Lapsed |