US3415844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Derivatives of 1-phenyl-2,2-dialkyl-1,3-dihydroxypropanes and 1-substituted phenyl - 2,2 - dialkyl - 1,3-dihydroxypropanes
Assignee: Fritzsche Brothers Inc
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Filing: 1965-01-04
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Granted: 1968-12-10
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Expires: 1985-01-04
Abstract
No abstract record available.
Inventors
- 👤 Kulka Kurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:39
CPC Classifications
C; C07; C07C; C07C69/00; C07C69/96; C07D; C07D317/00; C07D317/08; C07D317/44; C07D317/46; C07D317/48; C07D317/50; C07D317/54; C07D319/00; C07D319/04; C07D319/06
Claims Analysis
Total Claims: 0
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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) | 1971-12-10 | 1972-06-10 | 1972-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-10 | 1976-06-10 | 1976-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-10 | 1980-06-10 | 1980-12-10 | $7700.00 | Window Closed / Lapsed |