US2551813A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Free radical addition of h2s to olefins
Assignee: EIDP Inc
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Filing: 1949-02-25
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Granted: 1951-05-08
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Expires: 1969-02-25
Abstract
No abstract record available.
Inventors
- 👤 Pinkney Paul Swithin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:28
CPC Classifications
C; C07; C07C; C07C319/00; C07C319/02; C07C319/04; C07B; C07B45/00; C07B45/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
IN THE ADDITION OF HYDROGEN SULFIDE TO AN ETHYLENICALLY UNSATURATED COMPOUND, TO IMPROVEMENT WHEREIN THE ETHYLENICALLY UNSATURATED COMPOUND IS REACTED WITH THE HYDROGEN SULFIDE IN CONTACT WITH AN AZO COMPOUND WICH HAS AN ACYLIC AZO, -N=N-, GROUP BONDED TO DISCRETE NON-AROMATIC CARBONS, AT LEAST ONE OF WHICH IS TERTIARY AND HAS ATTACHED, THROUGH CARBON, A NEGATIVE RADICAL WHICH HAS THE THREE REMAINING VALENCES OF SAID CARBON SATISFIED ONLY BY ELEMENTS OF THE CLASS CONSISTING OF OXYGEN AND NITROGEN.
Claim 2
Dependent Claim
78 words
IN THE ADDITION OF HYDROGEN SULFIDE TO AN ETHYLENICALLY UNSATURATED COMPOUND, TO IMPROVEMENT WHEREIN THE ETHYLENICALLY UNSATURATED COMPOUND IS REACTED WITH THE HYDROGEN SULFIDE IN CONTACT WITH AN AZO COMPOUND WICH HAS AN ACYLIC AZO, -N=N-, GROUP BONDED TO DISCRETE NON-AROMATIC CARBONS, AT LEAST ONE OF WHICH IS TERTIARY AND HAS ATTACHED, THROUGH CARBON, A NEGATIVE RADICAL WHICH HAS THE THREE REMAINING VALENCES OF SAID CARBON SATISFIED ONLY BY ELEMENTS OF THE CLASS CONSISTING OF OXYGEN AND NITROGEN.
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) | 1954-05-07 | 1954-11-06 | 1955-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-07 | 1958-11-06 | 1959-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-07 | 1962-11-06 | 1963-05-08 | $7700.00 | Window Closed / Lapsed |