US2556856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of reacting alkyl mercaptans with synthetic rubbery diolefin polymers
Assignee: Standard Oil Development Co
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Filing: 1945-12-29
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Granted: 1951-06-12
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Expires: 1965-12-29
Abstract
No abstract record available.
Inventors
- 👤 Miller W Swaney
- 👤 Fred W Banes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:36
CPC Classifications
C; C08; C08C; C08C19/00; C08C19/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
IN THE METHOD OF PRODUCING DERIVATIVES OF A SYNTHETIC RUBBER-LIKE AUELUS EMULSION POLYMER OF A CONJUGATED DIOLEFIN HAVING 4 TO 6 CARBON ATOMS, THE IMPROVEMENT WHICH COMPRISES REACTING A LATEX OF SAID POLYMER, PREVIOUSLY STRIPPED OF UNREACTED MONOMERS, IN A CLOSED ZONE WITH AN ALIPHATIC MERCAPTAN CONTAINING UP TO 10 CARBON ATOMS PER MOLECULE IN THE ABSENCE OF OXYGEN AT A TEMPERATURE RANGING FROM ROOM TEMPERATURE TO 80* C. FOR A PERIOD RANGING FROM 1 TO 65 HOURS, WHEREBY THE VINYL SIDE GROUPS OF THE POLYMER ARE SELECTIVELY REACTED WITH THE MERCAPTAN TO THE EXTENT OF UP TO ABOUT 23 PERCENT OF THE TOTAL DOUBLE BONDS ORIGINALLY PRESENT IN THE POLYMER.
Claim 2
Dependent Claim
111 words
IN THE METHOD OF PRODUCING DERIVATIVES OF A SYNTHETIC RUBBER-LIKE AUELUS EMULSION POLYMER OF A CONJUGATED DIOLEFIN HAVING 4 TO 6 CARBON ATOMS, THE IMPROVEMENT WHICH COMPRISES REACTING A LATEX OF SAID POLYMER, PREVIOUSLY STRIPPED OF UNREACTED MONOMERS, IN A CLOSED ZONE WITH AN ALIPHATIC MERCAPTAN CONTAINING UP TO 10 CARBON ATOMS PER MOLECULE IN THE ABSENCE OF OXYGEN AT A TEMPERATURE RANGING FROM ROOM TEMPERATURE TO 80* C. FOR A PERIOD RANGING FROM 1 TO 65 HOURS, WHEREBY THE VINYL SIDE GROUPS OF THE POLYMER ARE SELECTIVELY REACTED WITH THE MERCAPTAN TO THE EXTENT OF UP TO ABOUT 23 PERCENT OF THE TOTAL DOUBLE BONDS ORIGINALLY PRESENT IN THE POLYMER.
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) | 1954-06-11 | 1954-12-11 | 1955-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-11 | 1958-12-11 | 1959-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-11 | 1962-12-11 | 1963-06-12 | $7700.00 | Window Closed / Lapsed |