US2537689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamide resins
Assignee: Monsanto Chemicals Ltd
•
Filing: 1948-04-15
•
Granted: 1951-01-09
•
Expires: 1968-04-15
Abstract
No abstract record available.
Inventors
- 👤 David T Mowry
- 👤 Eugene L Ringwald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:02
CPC Classifications
C; C08; C08G; C08G69/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
7 words
A RESINOUS COMPOSITION HAVING THE STRUCTURAL FORMULA:
Claim 2
Dependent Claim
7 words
A RESINOUS COMPOSITION HAVING THE STRUCTURAL FORMULA:
Claim 3
Independent Claim
16 words
A METHOD OF PREPARING RESINOUS COMPOSITIONS, WHICH COMPRISES MIXING FORMALDEHYDE AND A NITRILE HAVING THE STRUCTURE:
Claim 4
Independent Claim
16 words
A METHOD OF PREPARING RESINOUS COMPOSITIONS, WHICH COMPRISES MIXING FORMALDEHYDE AND A NITRILE HAVING THE STRUCTURE:
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) | 1954-01-08 | 1954-07-10 | 1955-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-08 | 1958-07-10 | 1959-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-08 | 1962-07-10 | 1963-01-09 | $7700.00 | Window Closed / Lapsed |