US2579939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molding composition and articles produced therefrom
Assignee: Wyeth Holdings LLC
•
Filing: 1950-06-06
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Granted: 1951-12-25
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Expires: 1970-06-06
Abstract
No abstract record available.
Inventors
- 👤 Lindenfelser Richard
- 👤 Clarence L Michaud
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:36
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/29; C08K5/31
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
A MOLDING COMPOSITION COMPRISING A THERMOSETTING AMINOPLAST RESIN SELECTED FROM THE GROUP CONSISTING OF (A) A MELAMINE-FORMALDEHYDE RESIN HAVING A MOLE RATIO OF 1:1,5 TO 1:4, RESPECTIVELY, AND (B) A GUANAMINE-FORMALDEHYDE RESIN HAVING A MOL RATIO OF 1:1 TO 1:4, RESPECTIVELY, WHEREIN SAID GUANAMINE HAS THE GENERAL FORMULA:
Claim 2
Dependent Claim
48 words
A MOLDING COMPOSITION COMPRISING A THERMOSETTING AMINOPLAST RESIN SELECTED FROM THE GROUP CONSISTING OF (A) A MELAMINE-FORMALDEHYDE RESIN HAVING A MOLE RATIO OF 1:1,5 TO 1:4, RESPECTIVELY, AND (B) A GUANAMINE-FORMALDEHYDE RESIN HAVING A MOL RATIO OF 1:1 TO 1:4, RESPECTIVELY, WHEREIN SAID GUANAMINE HAS THE GENERAL FORMULA:
References Cited (Backward Citations)
US2251234A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-24 | 1955-06-25 | 1955-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-24 | 1959-06-25 | 1959-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-24 | 1963-06-25 | 1963-12-25 | $7700.00 | Window Closed / Lapsed |