US3468983A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyethers containing phosphorus and alcoholic hydroxy groups and their production
Assignee: Chemische Fabrik Kalk GmbH
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Filing: 1965-12-20
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Granted: 1969-09-23
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Expires: 1985-12-20
Abstract
No abstract record available.
Inventors
- 👤 Hans Eberhard Praetzel
- 👤 Herbert Jenkner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:24
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5075; C08G18/5078; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/30; C07F9/301; C07F9/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-22 | 1973-03-24 | 1973-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-22 | 1977-03-24 | 1977-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-22 | 1981-03-24 | 1981-09-23 | $7700.00 | Window Closed / Lapsed |