US3061654A
Expired / Lapsed
US
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Isobutylene purification process using a pre-treated zeolitic molecular sieve
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1959-10-28
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Granted: 1962-10-30
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Expires: 1979-10-28
Abstract
No abstract record available.
Inventors
- 👤 Genshelmer David Edward
- 👤 Brown Elmo Clyde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:56
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/12; C07C7/13; B; B01; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/16; B01J20/18; B01J20/186; Y; Y10; Y10S; Y10S585/00; Y10S585/949; Y10S585/952
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
16 words
AN IMPROVED PROCESS FOR PREPARING ISOBUTYLENE STREAMS OF A HIGH DEGREE OF PURITY WHICH COMPRISES INITIAL-
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) | 1965-10-29 | 1966-04-30 | 1966-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-29 | 1970-04-30 | 1970-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-29 | 1974-04-30 | 1974-10-30 | $7700.00 | Window Closed / Lapsed |