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Patent US2874138A successfully refreshed from Google Patents.
US2874138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lower fatty acid esters of n, n, n', n' tetrakis (2-hydroxypropyl) ethylene diamine and vinyl chloride compositions containing same
Assignee: Wyandotte Chemicals Corp
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Filing: 1955-11-28
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Granted: 1959-02-17
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Expires: 1975-11-28
Abstract
No abstract record available.
Inventors
- 👤 Donald R Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:02
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/17
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
LOWER FATTY ACID ESTERS OF N,N,N'',N'' TETRAKIS (2HYDROXYPROPLY) ETHYLENE DIAMINE COMFORMING TO THE FORMULA
Claim 2
Dependent Claim
14 words
LOWER FATTY ACID ESTERS OF N,N,N'',N'' TETRAKIS (2HYDROXYPROPLY) ETHYLENE DIAMINE COMFORMING TO THE FORMULA
References Cited (Backward Citations)
GB635011A
Cited
US2697118A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-16 | 1962-08-18 | 1963-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-16 | 1966-08-18 | 1967-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-16 | 1970-08-18 | 1971-02-17 | $7700.00 | Window Closed / Lapsed |