Patent US2242223A successfully refreshed from Google Patents.
US2242223A
Expired / Lapsed
US
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Surface wetting agent and process of making it
Assignee: North American Rayon Corp
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Filing: 1937-11-30
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Granted: 1941-05-20
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Expires: 1957-11-30
Abstract
No abstract record available.
Inventors
- 👤 Rudolph S Bley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:15
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/06; C07D213/16; C07D213/20; D; D06; D06M; D06M13/00; D06M13/244; D06M13/282; D06M13/322; D06M13/46; D06M13/50; D06M13/51
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) | 1944-05-19 | 1944-11-18 | 1945-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-05-19 | 1948-11-18 | 1949-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-05-19 | 1952-11-18 | 1953-05-20 | $7700.00 | Window Closed / Lapsed |