Patent US2522589A successfully refreshed from Google Patents.
US2522589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photochemical reaction of unsaturated ethers with hydrogen sulfide
Assignee: Shell Development Co
•
Filing: 1945-03-28
•
Granted: 1950-09-19
•
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
2026-11-08 09:39
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C08; C08G; C08G75/00; C08G75/02; C08G75/04; C08G75/045; C08G75/12; C10M2221/00; C10M2221/02; C10M2221/04; C10M2221/043; C10N; C10N2040/00; C10N2040/08; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
100 words
IN A PROCESS FOR THE PRODUCTION OF AN UNSATURATED LINEAR POLYMER, THE STEPS COMPRISING SUBJECTING HYDROGEN SULFIDE AND A DIOLENFINICALLY UNSATURATED ALIPHATIC COMPOUND IN WHICH THE DOUBLE BONDS ARE CONTAINED IN TWO HYDROCARBON RADICALS SEPARATED BY AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF THE THIO AND OXY GROUPS, MIXED IN MOLAR PROPORTIONS OF FROM 1 TO 4 MOLES OF DIOLEFINIC COMPOUND PER MOLE OF HYDROGEN SULFIDE AND MAINTAINED IN THE LIQUID PHASE, TO LIGHT RADIATIONS HAVING WAVE LENGTHS BELOW 3000 ANGSTROM UNITS UNTIL PRODUCTS BOILING ABOVE 240* C. AT 1 CM. 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 |