US2540776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amide resins and resinous vehicles thereof
Assignee: Wyeth Holdings LLC
•
Filing: 1947-08-19
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Granted: 1951-02-06
•
Expires: 1967-08-19
Abstract
No abstract record available.
Inventors
- 👤 Leonard E Cadwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:50
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/02; C09D11/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
26 words
A PROCESS COMPRISING REACTING A ROSINBUTENDIOIC ACID ADDUCT WITH AN ALKYLOL PRIMARY AMINE TO EFFECT THE SALT THEREOF, AND HEAT-CONVERTING SAID SALT TO THE CORRESPONDING AMIDE.
Claim 2
Dependent Claim
26 words
A PROCESS COMPRISING REACTING A ROSINBUTENDIOIC ACID ADDUCT WITH AN ALKYLOL PRIMARY AMINE TO EFFECT THE SALT THEREOF, AND HEAT-CONVERTING SAID SALT TO THE CORRESPONDING AMIDE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-05 | 1954-08-07 | 1955-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-05 | 1958-08-07 | 1959-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-05 | 1962-08-07 | 1963-02-06 | $7700.00 | Window Closed / Lapsed |