US3829506A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Biodegradable surface active agents having good foam properties and foam stabilizing characteristics
Assignee: BASF Corp
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Filing: 1972-11-07
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Granted: 1974-08-13
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Expires: 1992-11-07
Abstract
Abstract HETERIC POLYETHER POLYOLS ARE PREPARED BY THE COPOLYMERIZATION OF LOW MOLECULAR WEIGHT ALKYLENE OXIDES AND A-OLEFIN OXIDES CONTAINING FROM TEN TO TWENTY CARBON ATOMS WITH LOW MOLECULAR WEIGHT ACTIVE HYDROGEN-CONTAINING COMPOUNDS.
Inventors
- 👤 I Schmolka
- 👤 R Seizinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:03
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/0005; C11D3/0094; C11D1/00; C11D1/66; C11D1/722; Y; Y10; Y10S; Y10S516/00; Y10S516/905; Y10S516/917; Y10S516/92
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) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |