US2440929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of 1:5-pentanediol
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1946-06-05
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Granted: 1948-05-04
•
Expires: 1966-06-05
Abstract
No abstract record available.
Inventors
- 👤 Bremner John George Mackay
- 👤 Starkey Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:01
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/74; B01J23/755; B01J23/16; B01J23/24; B01J23/26; B01J23/38; B01J23/54; B01J23/66; B01J23/68; B01J23/683; B01J23/685; B01J23/72; B01J23/76; B01J23/84; B01J23/85; B01J23/86; B01J23/868
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2097493A
Cited
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 |