US2684381A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ester amides of dialkylol amines and acid carbonates
Assignee: Columbia Southern Chemical Corp
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Filing: 1949-02-02
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Granted: 1954-07-20
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Expires: 1969-02-02
Abstract
No abstract record available.
Inventors
- 👤 William R Dial
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:54
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/205
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
7 words
A MONOHYDRIC ALCOHOL ESTER OF THE ACID
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) | 1957-07-19 | 1958-01-18 | 1958-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-19 | 1962-01-18 | 1962-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-19 | 1966-01-18 | 1966-07-20 | $7700.00 | Window Closed / Lapsed |