US3440171A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface active compositions
Assignee: Union Carbide Corp
•
Filing: 1964-06-29
•
Granted: 1969-04-22
•
Expires: 1984-06-29
Abstract
No abstract record available.
Inventors
- 👤 Roy R Warren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:35
CPC Classifications
C; C11; C11D; C11D1/00; C11D1/02; C11D1/12; C11D1/22; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2364767A
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US3017363A
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US2477383A
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US2723240A
Cited
US2712530A
Cited
US2944028A
Cited
US3005777A
Cited
US3192166A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-21 | 1972-10-21 | 1973-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-21 | 1976-10-21 | 1977-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-21 | 1980-10-21 | 1981-04-22 | $7700.00 | Window Closed / Lapsed |