US3320189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foamable polymer compositions wherein the blowing agent is the reaction product of an azodicarboxylate and an amine
Assignee: Gulf Oil Corp
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Filing: 1965-04-09
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Granted: 1967-05-16
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Expires: 1985-04-09
Abstract
No abstract record available.
Inventors
- 👤 George E Ham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:40
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; C08J9/10; C08J9/102
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A FOAMABLE POLYMER COMPOSITION COMPRISING A THERMOPLASTIC POLYMER AND A PRODUCT OBTAINED BY REACTING IN SOLUTION A LOWER ALKYL AXODICARBOXYLATE AND AN AMINE SELECTED FROM THE GROUP CONSISTING OF LOWER ALKYLENEDIAMINE, PIPERAZINE AND P-PHENYLENEDIAMINE AT A REACTION TEMPERATURE BELOW THAT AT WHICH DECOMPOSITION OCCURS WITH EVOLUTION OF GAS, SAID PRODUCT BEING PRESENT IN AN AMOUNT EFFECTIVE TO FOAM SAID POLYMER.
Claim 2
Dependent Claim
60 words
A FOAMABLE POLYMER COMPOSITION COMPRISING A THERMOPLASTIC POLYMER AND A PRODUCT OBTAINED BY REACTING IN SOLUTION A LOWER ALKYL AXODICARBOXYLATE AND AN AMINE SELECTED FROM THE GROUP CONSISTING OF LOWER ALKYLENEDIAMINE, PIPERAZINE AND P-PHENYLENEDIAMINE AT A REACTION TEMPERATURE BELOW THAT AT WHICH DECOMPOSITION OCCURS WITH EVOLUTION OF GAS, SAID PRODUCT BEING PRESENT IN AN AMOUNT EFFECTIVE TO FOAM SAID POLYMER.
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) | 1970-05-15 | 1970-11-14 | 1971-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-15 | 1974-11-14 | 1975-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-15 | 1978-11-14 | 1979-05-16 | $7700.00 | Window Closed / Lapsed |