Patent US770434A successfully refreshed from Google Patents.
US2344934A
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Quaternary nitrogen condensation products of methylol urea ethers
Assignee: Wyeth Holdings LLC
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Filing: 1943-02-12
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Granted: 1944-03-21
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Expires: 1963-02-12
Abstract
No abstract record available.
Inventors
- 👤 Herbert J West
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:05
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/06; C07D213/16; C07D213/20; C07C; C07C273/00; C07C273/18; C07C273/1854; C07C275/00; C07C275/04; C07C275/06; C07C275/14; C08; C08G; C08G12/00; C08G12/02; C08G12/04; C08G12/10; C08G12/12; C08G12/40; D; D06; D06M; D06M13/00; D06M13/322; D06M13/402; D06M13/432; D06M13/46; D06M13/47; D06M13/477; D06M15/00; D06M15/19; D06M15/37; D06M15/39; D06M15/423
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) | 1947-03-21 | 1947-09-20 | 1948-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-03-21 | 1951-09-20 | 1952-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-03-21 | 1955-09-20 | 1956-03-21 | $7700.00 | Window Closed / Lapsed |