Patent US3379683A successfully refreshed from Google Patents.
US3379683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethanes prepared from m-xylylenediamine
Assignee: EIDP Inc
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Filing: 1964-04-13
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Granted: 1968-04-23
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Expires: 1984-04-13
Abstract
No abstract record available.
Inventors
- 👤 Booth Max Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:00
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/58; D01F6/70; C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; Y; Y10; Y10S; Y10S528/00; Y10S528/906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
17 words
A SEGMENTED POLYMER OF FIBER-FORMING MOLECULAR WEIGHT COMPRISING A PLURALITY OF INTRALINEAR STRUCTURAL UNITS HAVING THE FORMULA
Claim 2
Dependent Claim
17 words
A SEGMENTED POLYMER OF FIBER-FORMING MOLECULAR WEIGHT COMPRISING A PLURALITY OF INTRALINEAR STRUCTURAL UNITS 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) | 1971-04-23 | 1971-10-23 | 1972-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-23 | 1975-10-23 | 1976-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-23 | 1979-10-23 | 1980-04-23 | $7700.00 | Window Closed / Lapsed |