Patent US4356099A successfully refreshed from Google Patents.
US4356099A
Expired / Lapsed
US
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Fabric treatment products
Assignee: Lever Brothers Co
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Filing: 1981-05-12
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Granted: 1982-10-26
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Expires: 2001-05-12
Abstract
Abstract A fabric treatment product for use in washing machines consists of a bag formed of water-insoluble, water-impermeable synthetic plastics sheet material containing a fabric treatment composition comprising a liquid, the bag having a weak seal that will be opened by the mechanical action of a washing machine.
Inventors
- 👤 James F. Davies
- 👤 John B. Tune
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:55
CPC Classifications
B; B65; B65D; B65D85/00; B65D85/70; B65D85/804; B65D85/808; B65D75/00; B65D75/52; B65D75/58; B65D75/5855; C; C11; C11D; C11D17/00; C11D17/04; C11D17/041; C11D17/046; D; D06; D06F; D06F39/00; D06F39/02; D06F39/024; B65D75/04; B65D75/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
101 words
In a fabric treatment product for washing machine use in the form of a bag containing a fabric treatment composition, the improvement which comprises a bag formed of water-insoluble water-impermeable synthetic thermoplastic sheet material, said bag containing a fabric treatment composition comprising a liquid, said bag being closed by at least one weak heat seal formed by two opposed bag walls heat-sealed to a separator sheet inter-positioned between them, said separator sheet being of porous material which is not thermoplastic at the heat-sealing temperature used, whereby said weak heat seal will self-open when in use and agitated in a washing machine.
Claim 2
Dependent Claim
101 words
In a fabric treatment product for washing machine use in the form of a bag containing a fabric treatment composition, the improvement which comprises a bag formed of water-insoluble water-impermeable synthetic thermoplastic sheet material, said bag containing a fabric treatment composition comprising a liquid, said bag being closed by at least one weak heat seal formed by two opposed bag walls heat-sealed to a separator sheet inter-positioned between them, said separator sheet being of porous material which is not thermoplastic at the heat-sealing temperature used, whereby said weak heat seal will self-open when in use and agitated in a washing machine.
Claim 3
Dependent Claim
23 words
The product of claim 1, wherein the separator sheet is of fibrous material selected from the group consisting of papers and nonwoven fabrics.
Claim 4
Dependent Claim
43 words
The product of claim 1, wherein the fabric treatment composition is selected from the group consisting of fully formulated fabric washing compositions, bleaches, bleach precursors, fabric softeners, enzymes, starch, perfumes, antibacterial agents, antistatic agents, whitening agents, blueing agents, stain-removing agents and mixtures thereof.
References Cited (Backward Citations)
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US4259373A
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GB1583082A
Cited
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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) | 1985-10-25 | 1986-04-26 | 1986-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-25 | 1990-04-26 | 1990-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-25 | 1994-04-26 | 1994-10-26 | $7700.00 | Window Closed / Lapsed |