US2522590A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photochemical reaction of unsaturated ethers with aliphatic mercaptans
Assignee: Shell Development Co
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Filing: 1945-03-28
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Granted: 1950-09-19
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Expires: 1965-03-28
Abstract
No abstract record available.
Inventors
- 👤 William E Vaughan
- 👤 Frederick F Rust
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:40
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/12; C07; C07C; C07C323/00; C08G75/02; C08G75/04; C08G75/045; C10; C10M; C10M2219/00; C10M2219/08; C10M2219/082; C10M2219/084; C10M2221/00; C10M2221/04; C10M2221/043; C10N; C10N2040/00; C10N2040/08
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
73 words
IN A PROCESS FOR THE PRODUCTION OF A LINEAR POLYETHER, THE STEP COMPRISING SUBJECTING A MIXTURE OF AN ALIPHATIC DIMERCAPTAN AND AN UNSATURATED ETHER CONTAINING AN UNSATURATED LINKAGE BETWEEN TWO CARBON ATOMS OF ALIPHATIC CHARACTER IN EACH OF TWO HYDROCARBON RADICALS JOINED BY AN OXY GROUP TO LIGHT RADIATIONS HAVING A WAVE LENGTH BELOW 3000 ANGSTROM UNITS UNTIL PRODUCTS BOILING ABOVE 240* C. AT 8 MM. PRESSURE ARE PRODUCED AND RECOVERING SUCH PRODUCTS.
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) | 1953-09-18 | 1954-03-20 | 1954-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-18 | 1958-03-20 | 1958-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-18 | 1962-03-20 | 1962-09-19 | $7700.00 | Window Closed / Lapsed |