US3219638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polysulfide polymers and process for their preparation
Assignee: Phillips Petroleum Co
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Filing: 1961-11-09
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Granted: 1965-11-23
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Expires: 1981-11-09
Abstract
No abstract record available.
Inventors
- 👤 Paul F Warner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:52
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
IN A PROCESS FOR THE PRODUCTION OF A POLYSULFIDE POLYMER COMPRISING CONTACTING UNDER POLYMERIZATION CONDITIONS IN A POLYMERIZATION ZONE AN ORGANIC DIMERCAPTAN COMPOUND WITH SULFUR IN THE PRESENCE OF A BASIC CATALYST, AND RECOVERING POLYMER SO PRODUCED, THE IMPROVEMENT WHICH COMPRISES CARRYING OUT SAID CONTACTING IN THE PRESENCE OF A MONOMERCAPTAN COMPOUND HAVING FROM 1 TO 16, INCLUSIVE, CARBON ATOMS PER MOLECULE ADDED TO SAID ZONE TO PROVIDE A MOLE RATIO OF DIMERCAPTAN TO A MONOMERCAPTAN OF AT LEAST 1:1 TO CONTROL THE MOLECULAR WEIGHT OF SAID POLUYMERIC PRODUCT.
Claim 2
Dependent Claim
89 words
IN A PROCESS FOR THE PRODUCTION OF A POLYSULFIDE POLYMER COMPRISING CONTACTING UNDER POLYMERIZATION CONDITIONS IN A POLYMERIZATION ZONE AN ORGANIC DIMERCAPTAN COMPOUND WITH SULFUR IN THE PRESENCE OF A BASIC CATALYST, AND RECOVERING POLYMER SO PRODUCED, THE IMPROVEMENT WHICH COMPRISES CARRYING OUT SAID CONTACTING IN THE PRESENCE OF A MONOMERCAPTAN COMPOUND HAVING FROM 1 TO 16, INCLUSIVE, CARBON ATOMS PER MOLECULE ADDED TO SAID ZONE TO PROVIDE A MOLE RATIO OF DIMERCAPTAN TO A MONOMERCAPTAN OF AT LEAST 1:1 TO CONTROL THE MOLECULAR WEIGHT OF SAID POLUYMERIC PRODUCT.
References Cited (Backward Citations)
US2076875A
Cited
US2329488A
Cited
US2605256A
Cited
US2676165A
Cited
US3019267A
Cited
US3037967A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |