US3391750A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surfactant composition
Assignee: Union Carbide Corp
•
Filing: 1965-08-09
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Granted: 1968-07-09
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Expires: 1985-08-09
Abstract
No abstract record available.
Inventors
- 👤 Harry T Zika
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:20
CPC Classifications
E; E21; E21B; E21B21/00; E21B21/16; C; C09; C09K; C09K8/00; C09K8/02; C09K8/38; C11; C11D; C11D1/00; C11D1/02; C11D1/12; C11D1/29; Y; Y10; Y10S; Y10S507/00; Y10S507/927; Y10S516/00; Y10S516/01; Y10S516/03
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) | 1971-07-09 | 1972-01-08 | 1972-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-09 | 1976-01-08 | 1976-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-09 | 1980-01-08 | 1980-07-09 | $7700.00 | Window Closed / Lapsed |