US2345543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cationic melamine-formaldehyde resin solution
Assignee: Wyeth Holdings LLC
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Filing: 1942-07-31
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Granted: 1944-03-28
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Expires: 1962-07-31
Abstract
No abstract record available.
Inventors
- 👤 Henry P Wohnsiedler
- 👤 Walter M Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:14
CPC Classifications
D; D21; D21H; D21H23/00; D21H23/76; D21H23/765; C; C08; C08G; C08G12/00; C08G12/02; C08G12/26; C08G12/30; C08G12/32; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/39; D06M15/423; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/47; D21H17/49; D21H17/51; D21H17/63; D21H17/66; D21H21/00; D21H21/14; D21H21/18; D21H21/20; D21J; D21J1/00; D21J1/08
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) | 1947-03-28 | 1947-09-27 | 1948-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-03-28 | 1951-09-27 | 1952-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-03-28 | 1955-09-27 | 1956-03-28 | $7700.00 | Window Closed / Lapsed |