Patent US2857357A successfully refreshed from Google Patents.
US2857357A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of vulcanizing butyl rubber and product resulting therefrom
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1956-06-28
•
Granted: 1958-10-21
•
Expires: 1976-06-28
Abstract
No abstract record available.
Inventors
- 👤 Winthrope C Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:38
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C08L; C08L23/00; C08L23/02; C08L23/18; C08L23/20; C08L23/22; C08L23/26; C08L23/28; C08L23/283; Y; Y10; Y10T; Y10T152/00; Y10T152/10; Y10T152/10495; Y10T428/00; Y10T428/13; Y10T428/1334; Y10T428/1352; Y10T428/1386
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A COMPOSITION COMPRISING A MAJOR PROPORTION OF A LOW UNSATURATED ISOOLEFIN-CONJUGATED DIOLEFIN RUBBERY COPOLYMER CONTAINING AT LEAST 90% ISOOLEFIN; MINOR PROPORTIONS OF A LOW UNSATURATED ISOOLEFIN-CONJUGATED DIOLEFIN CHLORINATED RUBBERY COPOLYMER CONTAINING AT LEAST 70% ISOOLEFIN AND AT LEAST 0.5 WT. PERCENT CHLORINE; AND A MINOR PROPORTION OF A DIMETHYLOL, PLARA-HYDROCARBON SUBSTITUTED PHENOL COMPOUND, SAID HYDROCARBON BEING SELECTED FROM THE GROUP CONSISTING OF C3-20 ALKYL GROUPS, CYCLO-ALKYL, ARYL AND ARALKYL GROUPS.
Claim 2
Dependent Claim
70 words
A COMPOSITION COMPRISING A MAJOR PROPORTION OF A LOW UNSATURATED ISOOLEFIN-CONJUGATED DIOLEFIN RUBBERY COPOLYMER CONTAINING AT LEAST 90% ISOOLEFIN; MINOR PROPORTIONS OF A LOW UNSATURATED ISOOLEFIN-CONJUGATED DIOLEFIN CHLORINATED RUBBERY COPOLYMER CONTAINING AT LEAST 70% ISOOLEFIN AND AT LEAST 0.5 WT. PERCENT CHLORINE; AND A MINOR PROPORTION OF A DIMETHYLOL, PLARA-HYDROCARBON SUBSTITUTED PHENOL COMPOUND, SAID HYDROCARBON BEING SELECTED FROM THE GROUP CONSISTING OF C3-20 ALKYL GROUPS, CYCLO-ALKYL, ARYL AND ARALKYL GROUPS.
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) | 1961-10-20 | 1962-04-21 | 1962-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-20 | 1966-04-21 | 1966-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-20 | 1970-04-21 | 1970-10-21 | $7700.00 | Window Closed / Lapsed |