US2671071A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamides of dialkyl dicarboxylates and 2,6-diaminopyridine, and quaternary salts thereof
Assignee: Eastman Kodak Co
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Filing: 1952-02-12
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Granted: 1954-03-02
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Expires: 1972-02-12
Abstract
No abstract record available.
Inventors
- 👤 Thomas T M Laakso
- 👤 Delbert D Reynolds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:30
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/26; G; G03; G03C; G03C1/00; G03C1/76; G03C1/825; G03C1/835; Y; Y10; Y10S; Y10S430/00; Y10S430/142
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
AN ALKYL QUANTERNARY SALT OF A RESINOUS POLYMER SELECTED FROM THE GROUP CONSISTING OF AN ALKYL QUANTERNARY SALT OF A LINEAR POLYAMIDE CONSISTING OF RECURRING STRUCTURAL UNITS OF THE FORMULA:
Claim 2
Dependent Claim
30 words
AN ALKYL QUANTERNARY SALT OF A RESINOUS POLYMER SELECTED FROM THE GROUP CONSISTING OF AN ALKYL QUANTERNARY SALT OF A LINEAR POLYAMIDE CONSISTING OF RECURRING STRUCTURAL UNITS OF THE FORMULA:
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) | 1957-03-01 | 1957-08-31 | 1958-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-01 | 1961-08-31 | 1962-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-01 | 1965-08-31 | 1966-03-02 | $7700.00 | Window Closed / Lapsed |