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US3187010A
Expired / Lapsed
US
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Polyhalo-4, 7-endomethylene-3a, 4, 7, 7alpha-tetrahydrophthalides
Assignee: Velsicol Chemical LLC
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Filing: 1962-09-10
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Granted: 1965-06-01
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Expires: 1982-09-10
Abstract
No abstract record available.
Inventors
- 👤 Alfred A Levin
- 👤 Sidney B Richter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:47
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/77; C07D307/93
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2654689A
Cited
US2657169A
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US2598562A
Cited
US2945865A
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US2997481A
Cited
DE1117568B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-05-31 | 1968-11-30 | 1969-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-31 | 1972-11-30 | 1973-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-31 | 1976-11-30 | 1977-06-01 | $7700.00 | Window Closed / Lapsed |