US2688604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modified aminoplast resins
Assignee: Wyeth Holdings LLC
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Filing: 1952-06-11
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Granted: 1954-09-07
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Expires: 1972-06-11
Abstract
No abstract record available.
Inventors
- 👤 Suen Tzeng Jiueq
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:19
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
A MOLDING COMPOSITION COMPRISING AN AMINOPLAST RESIN SELECTED FROM THE GROUP CONSISTING OF A MELAMINE-FORMALDEHYDE RESIN AND A UREAFORMALDEHYDE RESIN AND BETWEEN ABOUT 2% AND 15% BY WEIGHT OF A SUBSTITUTED PROPANE HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
36 words
A MOLDING COMPOSITION COMPRISING AN AMINOPLAST RESIN SELECTED FROM THE GROUP CONSISTING OF A MELAMINE-FORMALDEHYDE RESIN AND A UREAFORMALDEHYDE RESIN AND BETWEEN ABOUT 2% AND 15% BY WEIGHT OF A SUBSTITUTED PROPANE HAVING THE GENERAL FORMULA:
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) | 1957-09-06 | 1958-03-08 | 1958-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-06 | 1962-03-08 | 1962-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-06 | 1966-03-08 | 1966-09-07 | $7700.00 | Window Closed / Lapsed |