Patent US2563074A successfully refreshed from Google Patents.
US2563074A
Expired / Lapsed
US
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Production of spirohydrocarbons
Assignee: Universal Oil Products Co
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Filing: 1947-07-25
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Granted: 1951-08-07
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Expires: 1967-07-25
Abstract
No abstract record available.
Inventors
- 👤 Schmerling Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:44
CPC Classifications
C; C07; C07C; C07C13/00; C07C13/28; C07C13/32; C07C13/72; C07C1/00; C07C1/32; C07C1/325; C07C1/328; C07C13/02; C07C13/08; C07C13/15; C07C2601/00; C07C2601/06; C07C2601/10; C07C2603/00; C07C2603/93; C07C2603/94
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
A PROCESS FOR PRODUCING A SPIROHYDROCARBON WHICH COMPRISES CONDENSING AN ALKALI METAL CYCLOALKADIENE CONTAINING A METHYLENE GROUP ATTACHED TO TWO DOUBLE BONDED CARBON ATOMS AND A DIHALOALKANE HAVING THE STRUCTURE REPRESENTED BY THE FORMULA:
Claim 2
Dependent Claim
34 words
A PROCESS FOR PRODUCING A SPIROHYDROCARBON WHICH COMPRISES CONDENSING AN ALKALI METAL CYCLOALKADIENE CONTAINING A METHYLENE GROUP ATTACHED TO TWO DOUBLE BONDED CARBON ATOMS AND A DIHALOALKANE HAVING THE STRUCTURE REPRESENTED BY THE FORMULA:
References Cited (Backward Citations)
US2407214A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-06 | 1955-02-05 | 1955-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-06 | 1959-02-05 | 1959-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-06 | 1963-02-05 | 1963-08-07 | $7700.00 | Window Closed / Lapsed |