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US2813909A
Expired / Lapsed
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Polyhalomethanoindene derivatives of phenols
Assignee: Universal Oil Products Co
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Filing: 1956-10-11
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Granted: 1957-11-19
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Expires: 1976-10-11
Abstract
No abstract record available.
Inventors
- 👤 Schmerling Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:04
CPC Classifications
C; C07; C07C; C07C23/00; C07C23/18; C07C23/20; C07C23/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A PHENOLIC DERIVATIVE OF A POLYHALOMETHANOINDENE.
Claim 2
Dependent Claim
6 words
A PHENOLIC DERIVATIVE OF A POLYHALOMETHANOINDENE.
References Cited (Backward Citations)
US2584140A
Cited
US2616930A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-18 | 1961-05-20 | 1961-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-18 | 1965-05-20 | 1965-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-18 | 1969-05-20 | 1969-11-19 | $7700.00 | Window Closed / Lapsed |