US3351569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of expandable polymeric products
Assignee: Stamicarbon BV
•
Filing: 1962-12-03
•
Granted: 1967-11-07
•
Expires: 1982-12-03
Abstract
No abstract record available.
Inventors
- 👤 Leonardus J Revallier
- 👤 Booijs Coenraad L De
- 👤 Verweel Cornelis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:36
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0095; C08J9/0066; C08J9/04; C08J9/12; C08J9/14; C08J9/16; C08J9/18; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K7/00; C08K7/22; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/10; C08L91/00; C08L91/06; C08J2323/00; C08J2323/02; Y; Y10; Y10S; Y10S264/00; Y10S264/13; Y10S521/00; Y10S521/908
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
PROCESS FOR THE PREPARATION OF EXPANDABLE PRODUCTS BY CONTACTING A CRYSTALLINE THERMOPLASTIC POLYMER IN THE SOLID STATE SELECTED FROM THE GROUP CONSISTING OF THERMOPLASTIC POLYMERS OF ETHYLENE AND PROPYLENE WITH A LIQUID BLOWING AGENT YIELDING A GASEOUS PHASE DURING EXPANSION, WHEREIN THE POLYMER USED IS MIXED WITH AT LEAST 10% BY WEIGHT OF A FINELY DIVIDED INERT INORGANIC SOLID NUCLEATING AGENT SELECTED FROM THE GROUP CONSISTING OF MAGNESIUM OXIDE, DIATOMACEOUS EARTH, AEROSIL, SILICON DIOXIDE, PERLITE, ASBESTOS POWDER, METAL SILICATES, METAL CARBONATES, AND MIXTURES THEREOF, AND A WAX.
Claim 2
Dependent Claim
87 words
PROCESS FOR THE PREPARATION OF EXPANDABLE PRODUCTS BY CONTACTING A CRYSTALLINE THERMOPLASTIC POLYMER IN THE SOLID STATE SELECTED FROM THE GROUP CONSISTING OF THERMOPLASTIC POLYMERS OF ETHYLENE AND PROPYLENE WITH A LIQUID BLOWING AGENT YIELDING A GASEOUS PHASE DURING EXPANSION, WHEREIN THE POLYMER USED IS MIXED WITH AT LEAST 10% BY WEIGHT OF A FINELY DIVIDED INERT INORGANIC SOLID NUCLEATING AGENT SELECTED FROM THE GROUP CONSISTING OF MAGNESIUM OXIDE, DIATOMACEOUS EARTH, AEROSIL, SILICON DIOXIDE, PERLITE, ASBESTOS POWDER, METAL SILICATES, METAL CARBONATES, AND MIXTURES THEREOF, AND A WAX.
References Cited (Backward Citations)
US2577743A
Cited
US2681323A
Cited
US2727879A
Cited
US2941964A
Cited
US2849028A
Cited
US2945827A
Cited
US2875709A
Cited
US3067147A
Cited
US3026272A
Cited
US3098831A
Cited
US3072583A
Cited
US3072584A
Cited
US3060138A
Cited
US3224984A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-06 | 1971-05-08 | 1971-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-06 | 1975-05-08 | 1975-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-06 | 1979-05-08 | 1979-11-07 | $7700.00 | Window Closed / Lapsed |