Patent US4576284A successfully refreshed from Google Patents.
US4576284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Closing of filled capsules
Assignee: Warner Lambert Co LLC
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Filing: 1983-12-02
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Granted: 1986-03-18
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Expires: 2003-12-02
Abstract
Abstract A hard shell capsule for the exact dosage of substances, especially for pharmaceutical use, having a body part and a cap part which is joinable with said body. The body part has a side wall, a closed end and an open end. The cap part is die-molded or extruded as a stopper directly into the open end of the body after the body has been filled, so as to seal the contents within the capsule.
Inventors
- 👤 Fritz Wittwer
- 👤 Thomas Raible
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:48
CPC Classifications
B; B29; B29C; B29C66/00; B29C66/50; B29C66/51; B29C66/54; A; A61; A61J; A61J3/00; A61J3/07; A61J3/071; A61K; A61K9/00; A61K9/48; A61K9/4816; A61K9/4825; B29C65/00; B29C65/56; B29C65/58; B29C66/01; B29C66/05; B29C66/10; B29C66/12; B29C66/122; B29C66/1222; B29C66/1224; B29C66/128; B29C66/1282; B29C66/12821; B29C66/12822; B29C66/1284; B29C66/12841; B29C66/12842; B29C66/53; B29C66/534; B29C66/5342; B29C66/53423; B29C66/542; C; C08; C08L; C08L3/00; C08L3/02; B29C66/5346; B29C66/53461; B29C66/545; B29C66/70; B29C66/71; B29L; B29L2031/00; B29L2031/712; B29L2031/7174; Y; Y10; Y10S; Y10S220/00; Y10S220/34
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
78 words
A hard shell capsule for the exact dosage of solid, creamy and liquid substances which comprises a body part, said body part having a closed end, a sidewall extending from said closed end, and an open end, said sidewall having an internal recess extending circumferentially around said sidewall, adjacent said open end and a cap molded in situ, said cap being in engagement with said recess, whereby said open end of said capsule is sealed subsequent to filling.
Claim 2
Dependent Claim
78 words
A hard shell capsule for the exact dosage of solid, creamy and liquid substances which comprises a body part, said body part having a closed end, a sidewall extending from said closed end, and an open end, said sidewall having an internal recess extending circumferentially around said sidewall, adjacent said open end and a cap molded in situ, said cap being in engagement with said recess, whereby said open end of said capsule is sealed subsequent to filling.
Claim 3
Dependent Claim
21 words
Capsule according to claim 1, characterized in that the cap part is formed by extrusion techniques at elevated temperatures and pressures.
Claim 4
Dependent Claim
70 words
Capsule according to claim 2, characterized in that the cap part is made from a hydrophilic polymer material having a water content in a range of about 5% to 30%, by weight, an extruded temperature in a range of about 80° to 190° C., and is extruded by a screw extruder as it is widely applied in polymer processing industries with a pressure range of about 50 to 1500 bars.
Claim 5
Dependent Claim
18 words
A capsule according to claim 1 further including a cover plate positioned in said recess under said cap.
Claim 6
Dependent Claim
18 words
A capsule according to claim 4 wherein the dosage fills less than the enclosed portion of said capsule.
References Cited (Backward Citations)
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US1836220A
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US2340037A
Cited
US2663461A
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US3653500A
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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) | 1989-03-17 | 1989-09-16 | 1990-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-17 | 1993-09-16 | 1994-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-17 | 1997-09-16 | 1998-03-18 | $7700.00 | Window Closed / Lapsed |