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US3396151A
Expired / Lapsed
US
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Polyamides from methylene dibenzoic acid characterized by relatively high softening and melting points
Assignee: Eastman Kodak Co
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Filing: 1962-01-31
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Granted: 1968-08-06
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Expires: 1982-01-31
Abstract
No abstract record available.
Inventors
- 👤 John R Caldwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:50
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
20 words
A RESINOUS POLYAMIDE OF EQUIMOLAR PROPORTIONS OF 4,4''-METHYLENEDIBENZOIC ACID AND M-XYLENE-A,A''-DIAMINE, SAID POLYAMIDE HAVING A SOFTENING POINT OF FROM 210310*C.
Claim 2
Dependent Claim
20 words
A RESINOUS POLYAMIDE OF EQUIMOLAR PROPORTIONS OF 4,4''-METHYLENEDIBENZOIC ACID AND M-XYLENE-A,A''-DIAMINE, SAID POLYAMIDE HAVING A SOFTENING POINT OF FROM 210310*C.
References Cited (Backward Citations)
US2831834A
Cited
US2756221A
Cited
US2913433A
Cited
US2906774A
Cited
US3012994A
Cited
US2904587A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-06 | 1972-02-05 | 1972-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-06 | 1976-02-05 | 1976-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-06 | 1980-02-05 | 1980-08-06 | $7700.00 | Window Closed / Lapsed |