Patent US3558532A successfully refreshed from Google Patents.
US3558532A
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US
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Method for making ethylene polymer foams
Assignee: Dow Chemical Co
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Filing: 1968-04-10
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Granted: 1971-01-26
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Expires: 1988-04-10
Abstract
Abstract THE INVENTION RELATES TO IMPROVEMENT IN THE PRODUCTION OF ETHYLENE POLYMER FOAMS, AND PERTAINS ESPECIALLY TO NUCLEATING AGENTS FOR CONTROLLING THE SIZE OF THE CELLS AND THE RESILIENCY OF THE FOAM.
Inventors
- 👤 Donald J Sundquist
- 👤 Nicholas W Howell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:40
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0095; C08J2323/00; C08J2323/02; Y; Y10; Y10S; Y10S264/00; Y10S264/05; Y10S264/13
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |