US2948700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat reacting butyl rubber, halogenated butyl rubber and zinc oxide, and composition obtained thereby
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1957-04-04
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Granted: 1960-08-09
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Expires: 1977-04-04
Abstract
No abstract record available.
Inventors
- 👤 Lawrence T Eby
- 👤 Robert M Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:12
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08L; C08L23/00; C08L23/02; C08L23/18; C08L23/20; C08L23/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
IN A METHOD FOR PROCESSING A POLYMER SELECTED FROM THE GROUP CONSISTING OF HOMOPOLYMERS OF C4 TO C7 ISOOLEFINS, ISOOLEFIN-MULTIOLEFIN BUTYL RUBBER COPOLYMERS, AND MIXTURES THEROF, SAID POLYMERS HAVING VISCOSITY AVERAGE MOLECULAR WEIGHT OF BETWEEN ABOUT 300, AND 15,000,000, THE IMPROVEMENT WHICH COMPRISES HEATING SAID POLYMER, PRIOR TO SUCH PROCESSING, AT A TEMPERATURE LEVEL OF BETWEEN ABOUT 200* AND 400*F. WITH A MINOR PROPORTION OF AN ADMIXTURE OF A HALOGENATED ISOOLEFIN-MULTIOLRFIN BUTYL RUBBER COPOLYMER, THE HALOGEN IN SAID HALOGENATED COPOLYMER HAVING AN ATOMIC NUMBER OF AT LEAST ABOUT 17, AND ZINC OXIDE.
Claim 2
Dependent Claim
92 words
IN A METHOD FOR PROCESSING A POLYMER SELECTED FROM THE GROUP CONSISTING OF HOMOPOLYMERS OF C4 TO C7 ISOOLEFINS, ISOOLEFIN-MULTIOLEFIN BUTYL RUBBER COPOLYMERS, AND MIXTURES THEROF, SAID POLYMERS HAVING VISCOSITY AVERAGE MOLECULAR WEIGHT OF BETWEEN ABOUT 300, AND 15,000,000, THE IMPROVEMENT WHICH COMPRISES HEATING SAID POLYMER, PRIOR TO SUCH PROCESSING, AT A TEMPERATURE LEVEL OF BETWEEN ABOUT 200* AND 400*F. WITH A MINOR PROPORTION OF AN ADMIXTURE OF A HALOGENATED ISOOLEFIN-MULTIOLRFIN BUTYL RUBBER COPOLYMER, THE HALOGEN IN SAID HALOGENATED COPOLYMER HAVING AN ATOMIC NUMBER OF AT LEAST ABOUT 17, AND ZINC OXIDE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-09 | 1964-02-08 | 1964-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-09 | 1968-02-08 | 1968-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-09 | 1972-02-08 | 1972-08-09 | $7700.00 | Window Closed / Lapsed |