US4012342A
Expired / Lapsed
US
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Catalyst-containing fibers and the polymerization of olefins thereon
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1963-02-18
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Granted: 1977-03-15
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Expires: 1983-02-18
Abstract
Abstract The invention relates to polymerizing olefins in the presence of organic fibers and then removing the fibers to obtain hollow polyolefin resins.
Inventors
- 👤 Herbert W. Dougherty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:37
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/227; C; C08; C08F; C08F10/00; D06M14/00; D06M14/02; D06M14/04; D06M14/08; D06M14/12; D06M14/16; Y; Y10; Y10S; Y10S525/00; Y10S525/935; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
37 words
A high molecular weight, normally solid polymer of a lower alpha olefin coated on organic fibers containing polar groups wherein said fibers are cellulose fibers or fibers of plastic polymers having recurring amide groups in their molecules.
Claim 2
Dependent Claim
37 words
A high molecular weight, normally solid polymer of a lower alpha olefin coated on organic fibers containing polar groups wherein said fibers are cellulose fibers or fibers of plastic polymers having recurring amide groups in their molecules.
Claim 3
Dependent Claim
15 words
The organic fibers of claim 1 in which the fibers are made from a polyamide.
Claim 4
Dependent Claim
67 words
Organic fibers containing polar groups wherein said fibers are cellulose fibers or fibers of plastic polymers having recurring amide groups in their molecules and having on their surface a high molecular weight, normally solid olefin polymer produced by contacting a lower alpha olefin with said fibers containing on their surface a polymerization catalyst comprising an alkyl aluminum compound and a partially reduced titanium chloride under polymerization conditions.
Claim 5
Dependent Claim
67 words
Organic fibers containing polar groups wherein said fibers are cellulose fibers or fibers of plastic polymers having recurring amide groups in their molecules and having on their surface a high molecular weight, normally solid olefin polymer produced by contacting a lower alpha olefin with said fibers containing on their surface a polymerization catalyst comprising an alkyl aluminum compound and a partially reduced titanium chloride under polymerization conditions.
Claim 6
Dependent Claim
25 words
The fibers of claim 3 wherein the fibers have a lower molecular weight alpha monoolefin polymerized on their surface and the fibers are bonded together.
Claim 7
Dependent Claim
32 words
A free-flowing mixture of cellulose fibers each of which is substantially encased in a distinctly separate shell of polymerized ethylene said polymer shell being separable from said cellulose fibers by chemical means.
Claim 8
Dependent Claim
32 words
A free-flowing mixture of cellulose fibers each of which is substantially encased in a distinctly separate shell of polymerized ethylene said polymer shell being separable from said cellulose fibers by chemical means.
Claim 9
Dependent Claim
32 words
A free-flowing mixture of cellulose fibers each of which is substantially encased in a distinctly separate shell of polymerized propylene said polymer shell being separable from said cellulose fibers by chemical means.
Claim 10
Dependent Claim
32 words
A free-flowing mixture of cellulose fibers each of which is substantially encased in a distinctly separate shell of polymerized propylene said polymer shell being separable from said cellulose fibers by chemical means.
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) | 1980-03-14 | 1980-09-13 | 1981-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-14 | 1984-09-13 | 1985-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-14 | 1988-09-13 | 1989-03-15 | $7700.00 | Window Closed / Lapsed |