Patent US3440242A successfully refreshed from Google Patents.
US3440242A
Expired / Lapsed
US
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Aromatic polyalkylenamides
Assignee: 3M Co
•
Filing: 1963-09-12
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Granted: 1969-04-22
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Expires: 1983-09-12
Abstract
No abstract record available.
Inventors
- 👤 George H Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:19
CPC Classifications
C; C07; C07D; C07D203/00; C07D203/04; C07D203/06; C07D203/16; C07D203/18
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
24 words
A COMPOSITION OF MATTER COMPRISING A STABLE N,N''BIS(N-1,2-ALKYLENE) ISOPHTHALAMIDE HAVING AT LEAST 85 PERCENT OF THE THEORETICAL AZIRANE RING CONTENT AND HAVING THE FORMULA
Claim 2
Dependent Claim
24 words
A COMPOSITION OF MATTER COMPRISING A STABLE N,N''BIS(N-1,2-ALKYLENE) ISOPHTHALAMIDE HAVING AT LEAST 85 PERCENT OF THE THEORETICAL AZIRANE RING CONTENT AND HAVING THE FORMULA
Claim 3
Dependent Claim
18 words
A LIQUID COMPOSITION OF MATTER COMPRISING N,N''BIS-1,2-PROPYLENISOPHTHALAMIDE HAVING AT LEAST 85 PERCENT OF THE THEORETICAL AZIRANE RING CONTENT.
Claim 4
Dependent Claim
18 words
A LIQUID COMPOSITION OF MATTER COMPRISING N,N''BIS-1,2-PROPYLENISOPHTHALAMIDE HAVING AT LEAST 85 PERCENT OF THE THEORETICAL AZIRANE RING CONTENT.
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) | 1972-04-21 | 1972-10-21 | 1973-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-21 | 1976-10-21 | 1977-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-21 | 1980-10-21 | 1981-04-22 | $7700.00 | Window Closed / Lapsed |