US2502431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of diene hydrocarbons
Assignee: GAF Chemicals Corp
•
Filing: 1945-11-15
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Granted: 1950-04-04
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Expires: 1965-11-15
Abstract
No abstract record available.
Inventors
- 👤 John W Copenhaver
- 👤 Donald E Sargent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:37
CPC Classifications
C; C07; C07C; C07C1/00; C07C1/20; C07C2521/00; C07C2521/02; C07C2521/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
A PROCESS OF PRODUCING CONJUGATED DIENE HYDROCARBONS WHICH COMPRISES CONTACTING IN THE ABSENCE OF ADDED OLEFINES AND IN VAPOR PHASE A MIXTURE OF A COMPOUND SELECTED FROM THE CLASS CONSISTING OF ETHYLENICALLY UNSATURATED ETHERS OF THE TYPE:
Claim 2
Dependent Claim
37 words
A PROCESS OF PRODUCING CONJUGATED DIENE HYDROCARBONS WHICH COMPRISES CONTACTING IN THE ABSENCE OF ADDED OLEFINES AND IN VAPOR PHASE A MIXTURE OF A COMPOUND SELECTED FROM THE CLASS CONSISTING OF ETHYLENICALLY UNSATURATED ETHERS OF THE TYPE:
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) | 1953-04-03 | 1953-10-03 | 1954-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-03 | 1957-10-03 | 1958-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-03 | 1961-10-03 | 1962-04-04 | $7700.00 | Window Closed / Lapsed |