Patent US3554552A successfully refreshed from Google Patents.
US3554552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frangible article composed of polystyrene and polyethylene waxes
Assignee: Dow Chemical Co
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Filing: 1968-03-08
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Granted: 1971-01-12
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Expires: 1988-03-08
Abstract
Abstract The invention comprises fragile molded articles composed of compositions of polystyrene and polyethylene waxes, together with a lubricant or mold release agent, which articles are useful as targets in the practice of skeet shooting.
Inventors
- 👤 Thomas F Nixon
- 👤 John A Barber
- 👤 Floyd B Nagle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:25
CPC Classifications
F; F41; F41J; F41J1/00; F41J1/01; C; C08; C08K; C08K5/00; C08K5/04; C08K5/09; C08L; C08L25/00; C08L25/02; C08L25/04; C08L25/06; C08L23/00; C08L23/02; C08L23/04; C08L23/06; Y; Y10; Y10S; Y10S273/00; Y10S273/02; Y10S273/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
11 words
An article as claimed in claim 1 containing an orange dye.
Claim 2
Dependent Claim
14 words
An article as claimed in claim 1 when in the form of a disc.
Claim 3
Dependent Claim
15 words
An article as claimed in claim 1 when in the form of a hollow sphere.
Claim 4
Dependent Claim
129 words
An article of manufacture suitable for use as a target in practice and competition shooting comprising a fragile hollow sphere having walls between 0.01 and 0.03 inch thick prepared by molding half sphere shells from a cOmposition consisting essentially of from 96.7 to 99.4 percent by weight of polystyrene having a viscosity characteristic of from 10 to 30 centipoise as determined for a 30 weight percent solution of said polystyrene in toluene at 25* C., from 0.5 to 3 percent by weight of a polyethylene having a viscosity between 2,000 and 6,000 centipoise at 121* C. and from 0.01 to 0.03 percent by weight of an aliphatic monocarboxylic acid having from 12 to 26 carbon atoms in the molecule, and adhesively forming two half sphere shells to one another.
Claim 5
Dependent Claim
11 words
An article as claimed in claim 5 containing an orange dye.
Claim 6
Dependent Claim
15 words
An article as claimed in claim 5 wherein the aliphatic monocarboxylic acid is stearic acid.
Claim 7
Dependent Claim
15 words
An article as claimed in claim 5 wherein the aliphatic monocarboxylic acid is behenic acid.
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |