Patent US4228482A successfully refreshed from Google Patents.
Patent US3738992A successfully refreshed from Google Patents.
US3738992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1-aza-5-hydroxymethyl-3,7-dioxabicyclo-(3.3.0)-octann
Assignee: IMC Chemical Group Inc
•
Filing: 1972-02-07
•
Granted: 1973-06-12
•
Expires: 1992-02-07
Abstract
Abstract BICYCLIC OXAZOLIDINE ESTERS CORRESPONDING TO THE FORMULA 5-(R-COO-CH2-)-1-AZA-3,7-DIOXABICYCLO(3.3.0)OCTANE WHERE R IS AN ALKYL OR ALKENYL RADICAL OF FROM 8 TO 17 CARBON ATOMS. THE COMPOUNDS ARE USEFUL IN LUBRICANT COMPOSITIONS AND AS ANTI-FOAM AGENTS.
Inventors
- 👤 J Frump
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:56
CPC Classifications
C; C07; C07D; C07D498/00; C07D498/02; C07D498/04; D; D06; D06M; D06M13/00; D06M13/322; D06M13/35
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |