Patent US5041512A successfully refreshed from Google Patents.
US5041512A
Expired / Lapsed
US
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Melt-formable organoaluminum polymer
Assignee: EIDP Inc
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Filing: 1989-04-14
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Granted: 1991-08-20
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Expires: 2009-04-14
Abstract
Abstract An organoaluminum polymer formed from R 3 A1 and dialkylaluminum amide that is useful for forming shaped articles of inorganic aluminum nitride alone or with nitrides (other than AlN), oxides, borides, carbides or combinations thereof; R being selected from hydrogen; C 1 to C 10 alkyl; halogen; and substituted or unsubstituted phenyl, naphthyl and biphenyl; no more than two of the R groups being alkyl.
Inventors
- 👤 Frederick N. Tebbe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:25
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/58; C04B35/581; C04B35/622; C04B35/62227; C08; C08G; C08G79/00; C08G79/10
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
78 words
A melt-formable polymeric reaction product of dialkylaluminum amide and R 3 Al having a mole fraction derived from R 3 Al between about 0.01 and 0.5, wherein R is individually selected from the group consisting of hydrogen; C 1 to C 10 alkyl; halogen; phenyl; napthyl; biphenyl; and phenyl, naphthyl and biphenyl substituted with C 1 to C 10 alkyl, C 1 to C 10 alkoxy, and halogen; no more than two of the R groups being alkyl.
Claim 2
Dependent Claim
78 words
A melt-formable polymeric reaction product of dialkylaluminum amide and R 3 Al having a mole fraction derived from R 3 Al between about 0.01 and 0.5, wherein R is individually selected from the group consisting of hydrogen; C 1 to C 10 alkyl; halogen; phenyl; napthyl; biphenyl; and phenyl, naphthyl and biphenyl substituted with C 1 to C 10 alkyl, C 1 to C 10 alkoxy, and halogen; no more than two of the R groups being alkyl.
Claim 3
Dependent Claim
28 words
A polymer according to claim 1 wherein alkyl substituents in the dialkylaluminum amide and R 3 Al coreactants are independently selected from C 2 to C 6 alkyl.
Claim 4
Dependent Claim
15 words
A polymer according to claim 2 wherein the athyl alkyl substituent is C 2 alkyl.
Claim 5
Dependent Claim
15 words
A polymer according to claim 1 wherein at least one R is fluorine or chlorine.
Claim 6
Dependent Claim
11 words
A polymer according to claim 4 wherein one R is fluorine.
Claim 7
Dependent Claim
18 words
A polymer according to any one of claims 1 to 5 in the form of a viscous liquid.
Claim 8
Dependent Claim
18 words
A polymer according to any one of claims 1 to 5 in the form of a glassy solid.
Claim 9
Dependent Claim
15 words
A shaped article of the polymer according to any one of claims 1 to 5.
Claim 10
Dependent Claim
14 words
A fiber of the polymer according to any one of claims 1 to 5.
Claim 11
Independent Claim
30 words
A method for making a fiber of the polymer according to any one of claims 1 to 5 comprising melt-forming a fiber from the polymer in a viscous liquid state.
Claim 12
Independent Claim
28 words
A method for making a fiber of the polymer according to any one of claims 1 to 5 comprising forming a fiber from a solution of the polymer.
Claim 13
Dependent Claim
15 words
A spray-dried particle of a polymer according to any one of claims 1 to 5.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-08-19 | 1995-02-18 | 1995-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-19 | 1999-02-18 | 1999-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-19 | 2003-02-18 | 2003-08-20 | $7700.00 | Window Closed / Lapsed |