Patent US2853494A successfully refreshed from Google Patents.
US2853494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substituted 1, 2, 4-trioxanes, and a process for the preparation thereof
Assignee: Shell Development Co
•
Filing: 1954-04-05
•
Granted: 1958-09-23
•
Expires: 1974-04-05
Abstract
No abstract record available.
Inventors
- 👤 Edward R Bell
- 👤 George B Payne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:31
CPC Classifications
C; C07; C07D; C07D323/00; C07D323/04; C08; C08F; C08F4/00; C08F4/28; C08F4/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
1 words
3,3-DIMETHYL-1,2,4-TRIOXA-TRANS-DECALIN.
Claim 2
Dependent Claim
1 words
3,3-DIMETHYL-1,2,4-TRIOXA-TRANS-DECALIN.
References Cited (Backward Citations)
US2115207A
Cited
US2298405A
Cited
US2373942A
Cited
US2437648A
Cited
US2613223A
Cited
US2455569A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-22 | 1962-03-24 | 1962-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-22 | 1966-03-24 | 1966-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-22 | 1970-03-24 | 1970-09-23 | $7700.00 | Window Closed / Lapsed |