Patent US3249641A successfully refreshed from Google Patents.
US3249641A
Expired / Lapsed
US
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Catalyst and cycloolefin production
Assignee: Columbian Carbon Co
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Filing: 1962-06-14
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Granted: 1966-05-03
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Expires: 1982-06-14
Abstract
No abstract record available.
Inventors
- 👤 Charles D Storrs
- 👤 Reginald F Clark
- 👤 Herbert G Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:50
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/42; C07C2/44; C07C2/46; C07C2/465; C07C2531/00; C07C2531/02; C07C2531/12; C07C2531/14; C07C2531/16; C07C2531/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
23 words
A COMPOSITION OF MATTER WHICH COMPRISES THE PRODUCT DERIVED FROM ADMIXTURE OF MATERIALS CONSISTING ESSENTIALLY OF (A) A NICKEL COMPLEX OF THE FORMULA:
Claim 2
Dependent Claim
23 words
A COMPOSITION OF MATTER WHICH COMPRISES THE PRODUCT DERIVED FROM ADMIXTURE OF MATERIALS CONSISTING ESSENTIALLY OF (A) A NICKEL COMPLEX 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) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |