US3145195A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamide resins and process
Assignee: Hexion Inc
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Filing: 1960-05-25
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Granted: 1964-08-18
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Expires: 1980-05-25
Abstract
No abstract record available.
Inventors
- 👤 Kwan C Tsou
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:18
CPC Classifications
C; C08; C08G; C08G69/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
THE METHOD OF MAKING A WATER SOLUBLE LIQUID LINEAR POLYMIDE RESIN HAVING A VISCOSITY OF ABOUT 5,000 TO 100,000 CPS., COMPRISING FORMING A MIXTURE OF SUBSTANTIALLY EQUIMOLAR PROPORTIONS OF POLYAMINE CONTAINING AT LEAST TWO PRIMARY AMINO GROUPS AND AN ACRYLIC ESTER HAVING THE FORMULA
Claim 2
Independent Claim
44 words
THE METHOD OF MAKING A WATER SOLUBLE LIQUID LINEAR POLYMIDE RESIN HAVING A VISCOSITY OF ABOUT 5,000 TO 100,000 CPS., COMPRISING FORMING A MIXTURE OF SUBSTANTIALLY EQUIMOLAR PROPORTIONS OF POLYAMINE CONTAINING AT LEAST TWO PRIMARY AMINO GROUPS AND AN ACRYLIC ESTER HAVING 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) | 1967-08-18 | 1968-02-17 | 1968-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-18 | 1972-02-17 | 1972-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-18 | 1976-02-17 | 1976-08-18 | $7700.00 | Window Closed / Lapsed |