US2440678A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of alkyl-substituted ethanes
Assignee: EIDP Inc
•
Filing: 1946-02-23
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Granted: 1948-05-04
•
Expires: 1966-02-23
Abstract
No abstract record available.
Inventors
- 👤 Ford Thomas Aven
- 👤 Jacobson Henning Waldemar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:45
CPC Classifications
C; C07; C07C; C07C1/00; C07C1/20; C07C1/22; C07C2523/00; C07C2523/70; C07C2523/74; C07C2523/75
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) | 1951-05-04 | 1951-11-03 | 1952-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-05-04 | 1955-11-03 | 1956-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-05-04 | 1959-11-03 | 1960-05-04 | $7700.00 | Window Closed / Lapsed |