Patent US4650360A successfully refreshed from Google Patents.
US4650360A
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US
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Antistatic marking
Assignee: Dennison Manufacturing Co
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Filing: 1984-09-27
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Granted: 1987-03-17
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Expires: 2004-09-27
Abstract
Abstract A marking implement in which an antistatic material is incorporated in the housing of the implement. The antistatic material is a nonionic fatty acid ester and the housing is of plastic. The antistatic material effects a significant reduction in surface resistivity of the polyethylene.
Inventors
- 👤 Warren R. Pitts
- 👤 Lewis H. Johnson
- 👤 Steven M. Levin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:27
CPC Classifications
B; B43; B43K; B43K5/00; B43K5/005; C; C08; C08K; C08K5/00; C08K5/04; C08K5/10; C08K5/101
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
42 words
A marking implement comprising a polymeric housing containing a marking instrument wherein said instrument comrises a nib connection to a fluid marking medium and wherein an antistatic additive is incorporated in said polymeric housing, said additive comprising a nonionic fatty acid ester.
Claim 2
Dependent Claim
42 words
A marking implement comprising a polymeric housing containing a marking instrument wherein said instrument comrises a nib connection to a fluid marking medium and wherein an antistatic additive is incorporated in said polymeric housing, said additive comprising a nonionic fatty acid ester.
Claim 3
Dependent Claim
24 words
A marking implement in accordance with claim 1 wherein the fatty acid ester comprises between about 0.2 and 0.5 part by weight per hundred.
Claim 4
Dependent Claim
14 words
A marking implement in accordance with claim 2 wherein the housing is of polypropylene.
Claim 5
Dependent Claim
30 words
A marking implement in accordance with claim 3 wherein the antistatic material reduces the surface resistivity of said polypropylene from about 10 15 ohms to less than 10 12 ohms.
Claim 6
Dependent Claim
21 words
A marking implement in accordance with claim 4 wherein said housing contains a semiconductive colorant which coacts with said antistatic material.
Claim 7
Dependent Claim
21 words
A marking implement in accordance with claim 5 wherein the semiconductive material is about one part per hundred of said housing.
Claim 8
Dependent Claim
14 words
A marking implement in accordance with claim 6 wherein the colorant is carbon black.
Claim 9
Dependent Claim
16 words
A marking implement in accordance with claim 1 wherein the nonionic fatty acid ester is hydrophyllic.
Claim 10
Dependent Claim
18 words
A marking implement in accordance with claim 8 wherein the hydrophyllic fatty acid ester is a polyol stearate.
Claim 11
Dependent Claim
16 words
A marking implement in accordance with claim 9 wherein the polyol stearate is a polyalkyl glycol.
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) | 1990-03-16 | 1990-09-15 | 1991-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-16 | 1994-09-15 | 1995-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-16 | 1998-09-15 | 1999-03-17 | $7700.00 | Window Closed / Lapsed |