Patent US2221933A successfully refreshed from Google Patents.
US2221933A
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Wetting composition
Assignee: National Aniline and Chemical Co Inc
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Filing: 1937-12-30
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Granted: 1940-11-19
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Expires: 1957-12-30
Abstract
No abstract record available.
Inventors
- 👤 Michael A Eitelman
- 👤 Lawrence H Flett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:14
CPC Classifications
C; C11; C11D; C11D1/00; C11D1/02; C11D1/12; C11D1/22; C09; C09K; C09K23/00; C09K23/017; C11D3/00; C11D3/16; C11D3/20; C11D3/2003; C11D3/2006; C11D3/2034; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/03
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) | 1943-11-19 | 1944-05-20 | 1944-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-11-19 | 1948-05-20 | 1948-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-11-19 | 1952-05-20 | 1952-11-19 | $7700.00 | Window Closed / Lapsed |