US2900392A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of dithianes
Assignee: Pure Oil Co
•
Filing: 1955-12-20
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Granted: 1959-08-18
•
Expires: 1975-12-20
Abstract
No abstract record available.
Inventors
- 👤 Nathaniel L Remes
- 👤 William A Krewer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:26
CPC Classifications
C; C07; C07D; C07D339/00; C07D339/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
A METHOD FOR PREPARING SUBSTITUTED DITHIANES WHICH COMPRISES HEATING AN EPI-COMPOUND CONTAINING AT LEAST FIVE CARBON ATOMS PER MOLECULE, AND HAVING THE GENERAL FORMULA
Claim 2
Independent Claim
24 words
A METHOD FOR PREPARING SUBSTITUTED DITHIANES WHICH COMPRISES HEATING AN EPI-COMPOUND CONTAINING AT LEAST FIVE CARBON ATOMS PER MOLECULE, AND HAVING THE GENERAL FORMULA
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) | 1962-08-17 | 1963-02-16 | 1963-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-17 | 1967-02-16 | 1967-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-17 | 1971-02-16 | 1971-08-18 | $7700.00 | Window Closed / Lapsed |