US2900430A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the removal of straight chain acetylenes from isoprene
Assignee: Gulf Research and Development Co
•
Filing: 1956-12-28
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Granted: 1959-08-18
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Expires: 1976-12-28
Abstract
No abstract record available.
Inventors
- 👤 Alfred M Henke
- 👤 Harry C Stauffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:58
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/005; C07C7/12; C07C7/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
A PROCESS FOR REDUCING THE STRAIGHT CHAIN ACETYLENE CONTENT OF ISOPRENE WHICH COMPRISES DRYING ISOPRENE CONTASINING A STRAIGHT CHAIN ACETYLENE AND CONTACTING SAID DRIED ISOPRENE WITH DRY MILECULAR SIEVES HAVING A CHAINNEL DIAMETER OF 5 ANGSTROM UNITS.
Claim 2
Dependent Claim
37 words
A PROCESS FOR REDUCING THE STRAIGHT CHAIN ACETYLENE CONTENT OF ISOPRENE WHICH COMPRISES DRYING ISOPRENE CONTASINING A STRAIGHT CHAIN ACETYLENE AND CONTACTING SAID DRIED ISOPRENE WITH DRY MILECULAR SIEVES HAVING A CHAINNEL DIAMETER OF 5 ANGSTROM UNITS.
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) | 1962-08-17 | 1963-02-16 | 1963-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-17 | 1967-02-16 | 1967-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-17 | 1971-02-16 | 1971-08-18 | $7700.00 | Window Closed / Lapsed |