US3048566A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymers from polyisocyanates and process for producing them
Assignee: EIDP Inc
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Filing: 1958-08-18
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Granted: 1962-08-07
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Expires: 1978-08-18
Abstract
No abstract record available.
Inventors
- 👤 Ralph G Beaman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:34
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/02; Y; Y10; Y10S; Y10S528/00; Y10S528/903; Y10S528/906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A SYNTHETIC LINEAR POLYMER PREPARED FROM AN ORGANIC POLYISOCYANATE HAVING AT LEAST TWO VICINAL ISOCYANATE GROUPS, SAID POLYISOCYANATE BEING OTHERWISE FREE OF SUBSTITUENTS REACTIVE WITH AN ISOCYANATE GROUP, SAID POLYMER HAVING A MOLECULAR WEIGHT OF AT LEAST 2000 AND CONSISTING ESSENTIALLY OF REPEATING STRUCTURAL UNITS CONTAINING FIVE-MEMBERED RINGS, SAID RINGS CONTAINING TWO NITROGEN ATOMS JOINED TO A CARBON ATOM OF A CARBONYL GROUP COMMON TO SAID NITROGEN ATOMS AND TWO INTERCONNECTED CARBON ATOMS EACH OF WHICH IS ATTACHED TO ONE OF SAID NITROGEN ATOMS, SAID INTERCONNECTED CARBON ATOMS BEING THE CARBON ATOMS WHICH JOINED THE VICINAL ISOYANATE GROUPS IN SAID POLYISOCYANATE, SAID REPEATING UNITS BEING INTERCONNECTED IN THE POLYMER CHAIN BY CARBONYL GROUPS ATTACHED TO NITROGENS OF SAID RINGS.
Claim 2
Dependent Claim
119 words
A SYNTHETIC LINEAR POLYMER PREPARED FROM AN ORGANIC POLYISOCYANATE HAVING AT LEAST TWO VICINAL ISOCYANATE GROUPS, SAID POLYISOCYANATE BEING OTHERWISE FREE OF SUBSTITUENTS REACTIVE WITH AN ISOCYANATE GROUP, SAID POLYMER HAVING A MOLECULAR WEIGHT OF AT LEAST 2000 AND CONSISTING ESSENTIALLY OF REPEATING STRUCTURAL UNITS CONTAINING FIVE-MEMBERED RINGS, SAID RINGS CONTAINING TWO NITROGEN ATOMS JOINED TO A CARBON ATOM OF A CARBONYL GROUP COMMON TO SAID NITROGEN ATOMS AND TWO INTERCONNECTED CARBON ATOMS EACH OF WHICH IS ATTACHED TO ONE OF SAID NITROGEN ATOMS, SAID INTERCONNECTED CARBON ATOMS BEING THE CARBON ATOMS WHICH JOINED THE VICINAL ISOYANATE GROUPS IN SAID POLYISOCYANATE, SAID REPEATING UNITS BEING INTERCONNECTED IN THE POLYMER CHAIN BY CARBONYL GROUPS ATTACHED TO NITROGENS OF SAID RINGS.
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) | 1965-08-06 | 1966-02-05 | 1966-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-06 | 1970-02-05 | 1970-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-06 | 1974-02-05 | 1974-08-07 | $7700.00 | Window Closed / Lapsed |