Patent US4882110A successfully refreshed from Google Patents.
US4882110A
Expired / Lapsed
US
⏱️ 0.0 years remaining
CO2 copolymer binder for forming ceramic bodies and a shaping process using the same
Assignee: PAC POLYMER Inc A CORP OF
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Filing: 1987-01-27
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Granted: 1989-11-21
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Expires: 2007-01-27
Abstract
Abstract The present invention relates to a binder and a method for making and shaping a green body of ceramic powder and subsequently producing a formed ceramic body. The method of the present invention comprises admixing a ceramic powder with a binder comprising a polyalkylene carbonate to form a ceramic-binder mixture. The binder of the present invention comprises a polyalkylene carbonate, preferably polyethylene carbonate or polypropylene carbonate.
Inventors
- 👤 Daniel P. Kramer
- 👤 Joseph G. Santangelo
- 👤 James J. Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:48
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/626; C04B35/63; C04B35/632; C04B35/634; C04B35/63448; C04B35/63464
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
48 words
A method for producing a shaped ceramic body which comprises: (a) admixing a ceramic powder with a binder comprising a polyalkylene carbonate to produce a ceramic-binder mixture; (b) shaping the ceramic-binder mixture into a green body; and (c) sintering the green body to form the shaped ceramic body.
Claim 2
Independent Claim
48 words
A method for producing a shaped ceramic body which comprises: (a) admixing a ceramic powder with a binder comprising a polyalkylene carbonate to produce a ceramic-binder mixture; (b) shaping the ceramic-binder mixture into a green body; and (c) sintering the green body to form the shaped ceramic body.
Claim 3
Dependent Claim
47 words
The method of claim 1, wherein said binder comprising a polyalkylene carbonate is a solution of an organic solvent and the polyalkylene carbonate, and said method further comprises removing said organic solvent from the ceramic-binder mixture to produce a free-flowing powder prior to shaping said ceramic-binder mixture.
Claim 4
Dependent Claim
50 words
The method of claim 1, wherein said binder comprising a polyalkylene carbonate is an emulsion of the polyalkylene carbonate with either water or an organic, and said method further comprises removing said water or organic from the ceramic-binder mixture to produce a free-flowing powder prior to shaping said ceramic-binder mixture.
Claim 5
Dependent Claim
15 words
The method of claim 1, wherein the green body is sintered in an oxidizing atmosphere.
Claim 6
Dependent Claim
15 words
The method of claim 1, wherein the green body is sintered in a non-oxidizing atmosphere.
Claim 7
Dependent Claim
23 words
The method of claim 5, wherein the non-oxidizing atmosphere is selected from the group consisting of argon, helium, nitrogen, hydrogen and mixtures thereof.
Claim 8
Independent Claim
57 words
A method for producing a shaped green body of ceramic powder which comprises: (a) admixing a ceramic powder with a binder comprising a polyalkylene carbonate to produce a ceramic-binder mixture, the ceramic-binder mixture containing between 0.5 wt % and 15 wt % binder comprising a polyalkylene carbonate; and (b) shaping the ceramic-binder mixture into a green body.
Claim 9
Independent Claim
57 words
A method for producing a shaped green body of ceramic powder which comprises: (a) admixing a ceramic powder with a binder comprising a polyalkylene carbonate to produce a ceramic-binder mixture, the ceramic-binder mixture containing between 0.5 wt % and 15 wt % binder comprising a polyalkylene carbonate; and (b) shaping the ceramic-binder mixture into a green body.
Claim 10
Dependent Claim
47 words
The method of claim 7, wherein the binder comprising a polyalkylene carbonate is a solution of an organic solvent and the polyalkylene carbonate, and the method further comprises removing the organic solvent from the ceramic-binder mixture to produce a free-flowing powder prior to shaping the ceramic-binder mixture.
Claim 11
Dependent Claim
50 words
The method of claim 7, wherein the binder comprising a polyalkylene carbonate is an emulsion of the polyalkylene carbonate with either water or an organic, and the method further comprises removing the water or organic from the ceramic-binder mixture to produce a free-flowing powder prior to shaping the ceramic-binder mixture.
References Cited (Backward Citations)
US3706713A
Cited
US3900424A
Cited
US3953383A
Cited
US4166898A
Cited
US4158688A
Cited
US4346049A
Cited
US4353958A
Cited
US4283360A
Cited
US4608361A
Cited
US4478790A
Cited
US4496506A
Cited
US4474731A
Cited
US4530808A
Cited
US4551496A
Cited
JPH06221753A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-11-20 | 1993-05-22 | 1993-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-20 | 1997-05-22 | 1997-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-20 | 2001-05-22 | 2001-11-21 | $7700.00 | Window Closed / Lapsed |