Patent US5016639A successfully refreshed from Google Patents.
US3067244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of dielsalder adducts
Assignee: Shell USA Inc
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Filing: 1959-03-02
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Granted: 1962-12-04
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Expires: 1979-03-02
Abstract
No abstract record available.
Inventors
- 👤 Robinson Robert
- 👤 Fray Gordon Ian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:20
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
IN THE PROCESS FOR THE PRODUCTION OF A SUBSTITUTED CYCLOHEXENE WHEREIN A CONJUGATED DIENE SELECTED FROM THE GROUP CONSISTING OF BUTADIENES, CYCLOPENTADIENE AND HEXACHLOROCYCLOPENTADIENE IS REACTED WITH AN UNSATURATED DIENOPHILE OF THE FORMULA
Claim 2
Dependent Claim
33 words
IN THE PROCESS FOR THE PRODUCTION OF A SUBSTITUTED CYCLOHEXENE WHEREIN A CONJUGATED DIENE SELECTED FROM THE GROUP CONSISTING OF BUTADIENES, CYCLOPENTADIENE AND HEXACHLOROCYCLOPENTADIENE IS REACTED WITH AN UNSATURATED DIENOPHILE OF THE FORMULA
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) | 1965-12-03 | 1966-06-04 | 1966-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-03 | 1970-06-04 | 1970-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-03 | 1974-06-04 | 1974-12-04 | $7700.00 | Window Closed / Lapsed |