US3682803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the photochemical sulfoxidation of n-paraffin
Assignee: Kao Corp
•
Filing: 1970-04-20
•
Granted: 1972-08-08
•
Expires: 1990-04-20
Abstract
Abstract A PROCESS FOR THE PHOTOCHEMICAL SULFOXIDATION OF N-PARAFFIN COMPRISES IRRADIATING N-PARAFFIN HAVING 10-20 CARBON ATOMS EXCLUSIVELY WITH RADIATIONS WITHIN A LIMITED WAVE LENGTH RANGE, FROM WHICH THE RAYS OF WAVE LENGTHS SHORTER THAN 300 MU WERE CUT OFF IN THE PRESENCE OF SULFUR DIOXIDE AND OXYGEN WHEREBY THE FORMATION OF UNDESIRABLE BROWNISH RESINOUS MATTER IS PREVENTED.
Inventors
- 👤 Yuzuru Ogata
- 👤 Sumio Arai
- 👤 Ichiro Iwasa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:46
CPC Classifications
C; C07; C07C; C07C309/00; Y; Y10; Y10S; Y10S204/00; Y10S204/902; Y10S204/903
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) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |