US4466330A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disintegrating, densely filled polyamide molding composition
Assignee: Huels AG
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Filing: 1982-07-16
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Granted: 1984-08-21
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Expires: 2002-07-16
Abstract
Abstract A polyamide molding composition filled with fine particulate metals for injection molding into practice hand grenades and shells which disintegrate into small pieces.
Inventors
- 👤 Heinz Juretzek
- 👤 Wolfgang Kriesten
- 👤 Paul Sindermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:26
CPC Classifications
F; F42; F42B; F42B8/00; F42B8/12; F42B8/26; C; C08; C08K; C08K3/00; C08K3/02; C08K3/08; F42B8/14; F42B8/16
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
58 words
A polyamide molding composition densely filled with fine particulate metals for injection molding into molded articles which disintegrate into small particles, comprising: (a) 5 to 20% by weight of polylauryllactam having a relative viscosity between 1.6 to 2.2 as determined by German Industrial Standard DIN 53 727; and (b) 80 to 95% by weight of fine particulate metals.
Claim 2
Dependent Claim
58 words
A polyamide molding composition densely filled with fine particulate metals for injection molding into molded articles which disintegrate into small particles, comprising: (a) 5 to 20% by weight of polylauryllactam having a relative viscosity between 1.6 to 2.2 as determined by German Industrial Standard DIN 53 727; and (b) 80 to 95% by weight of fine particulate metals.
Claim 3
Dependent Claim
17 words
The composition of claim 1, wherein said fine particulate metals have a size less than 100 microns.
Claim 4
Dependent Claim
21 words
The composition of claim 2, wherein (a) is 5 to 15% by weight and (b) is 85 to 95% by weight.
Claim 5
Independent Claim
74 words
A method of producing a densely filled molded article which disintegrates into small particles, comprising: (a) mixing 5 to 20% by weight molten polylauryllactam having a relative viscosity between 1.6 to 2.2 as determined by German Industrial Standard DIN 53 727 with; (b) 80 to 95% by weight of fine particulate metals to form a densely filled molding composition; and (c) injection molding said composition into said molded article which disintegrates into small particles.
Claim 6
Independent Claim
74 words
A method of producing a densely filled molded article which disintegrates into small particles, comprising: (a) mixing 5 to 20% by weight molten polylauryllactam having a relative viscosity between 1.6 to 2.2 as determined by German Industrial Standard DIN 53 727 with; (b) 80 to 95% by weight of fine particulate metals to form a densely filled molding composition; and (c) injection molding said composition into said molded article which disintegrates into small particles.
Claim 7
Dependent Claim
21 words
The method of claim 4, wherein said molded article has a density of about 3.5 to 4.9 grams per cubic meter.
Claim 8
Dependent Claim
17 words
The method of claim 5, wherein said fine particulate metals have a size less than 100 microns.
Claim 9
Dependent Claim
14 words
The method of claim 6, wherein said molded article is a practice hand grenade.
Claim 10
Dependent Claim
14 words
The method of claim 7, wherein said molded article is a practice mortar shell.
Claim 11
Dependent Claim
21 words
The method of claim 7, wherein said hand grenade has a density of about 4.2 to 4.5 grams per cubic meter.
Claim 12
Dependent Claim
21 words
The method of claim 8, wherein said mortar shell has a density of about 4.2 to 4.5 grams per cubic meter.
Claim 13
Dependent Claim
17 words
The method of claim 7, wherein said practice hand grenade is injection molded into two half bodies.
Claim 14
Dependent Claim
17 words
The method of claim 8, wherein said practice mortar shell is injection molded into two half bodies.
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) | 1987-08-21 | 1988-02-20 | 1988-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-21 | 1992-02-20 | 1992-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-21 | 1996-02-20 | 1996-08-21 | $7700.00 | Window Closed / Lapsed |