US2841572A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-soluble polyesters
Assignee: Wyandotte Chemicals Corp
•
Filing: 1955-12-14
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Granted: 1958-07-01
•
Expires: 1975-12-14
Abstract
No abstract record available.
Inventors
- 👤 Mcmahon John Philip
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:34
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/685; C08G63/6854
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
19 words
A WTER-SOLUBLE POLYESTER WHICH IS THE CONDENSATION PRODUCT OF N,N,N'',N'' TETRAKIS (2-HYDROXYPROPYL) ALKYLENE DIAMINE CONFORMING TO THE STRUCTURAL FORMULA:
Claim 2
Dependent Claim
19 words
A WTER-SOLUBLE POLYESTER WHICH IS THE CONDENSATION PRODUCT OF N,N,N'',N'' TETRAKIS (2-HYDROXYPROPYL) ALKYLENE DIAMINE CONFORMING TO THE STRUCTURAL FORMULA:
References Cited (Backward Citations)
US2262738A
Cited
US2697113A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-30 | 1961-12-30 | 1962-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-30 | 1965-12-30 | 1966-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-30 | 1969-12-30 | 1970-07-01 | $7700.00 | Window Closed / Lapsed |