US3650816A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Additives for clothes dryers
Assignee: Lever Brothers Co
•
Filing: 1969-07-17
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Granted: 1972-03-21
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Expires: 1989-07-17
Abstract
Abstract A novel method for applying adjuvants to fabric employing a tumbler-type dryer is disclosed. To achieve uniform distribution of the adjuvant on the fabric, the adjuvant, in accordance with the present invention, is sprayed on to the dryer drum. Spreading agents, distributing agents or carrier may be included in the composition sprayed on to the dryer drum if desired. Novel compositions of matter suitable for use in the practice of this invention are also disclosed.
Inventors
- 👤 Jerome Rudy
- 👤 Anthony A Rapisarda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:10
CPC Classifications
C; C11; C11D; C11D17/00; C11D17/04; C11D17/041; C11D17/047; C11D1/00; C11D1/38; C11D1/62; C11D17/0043; C11D3/00; C11D3/0005; C11D3/001; C11D3/0015; C11D3/16; C11D3/26; C11D3/32; C11D3/323; C11D3/37; C11D3/3703; C11D3/3707; D; D06; D06F; D06F58/00; D06F58/30; D06M; D06M13/00; D06M13/322; D06M13/46; D06M16/00; D06M23/00; D06M23/06; D06F58/20; D06F58/203; Y; Y10; Y10T; Y10T442/00; Y10T442/20; Y10T442/2352
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
39 words
A method according to claim 1 for treating cloth with a fabric softener, wherein said cloth adjuvant applied to the interior surface of said dryer drum is a fabric softener having a softening point between 70* and 200* F.
Claim 2
Dependent Claim
123 words
A method according to claim 2 wherein said fabric softener is selected from the group consisting of quaternary ammonium compounds of the formula N(R1R2R3R3)yX and the reaction product of about 2 moles of a fatty acid of the formula R4COOH and hydroxyalkyldiamine of the formula where R1 is a C16 to C20 alkyl group, R2 is a C1 to C4 alkyl group, R3 is selected from the group consisting of R1 and R2, R4 is a C15 to C19 alkyl group, R5 is a C1 to C3 divalent hydrocarbon radical and R6 is a hydroxyalkyl group of from about one to three carbon atoms, X is a anion imparting water dispersibility to the cationic ammonium compound, and y is the VALENCY of X.
Claim 3
Dependent Claim
28 words
A method according to claim 1 wherein said cloth adjuvant is a germicide selected from the group consisting of halogenated salicylanilides, hexachlorophene, neomycin sulfate, and benzalkonium quaternary compounds.
Claim 4
Dependent Claim
14 words
A method according to claim 1 wherein said cloth adjuvant is an optical brightener.
Claim 5
Dependent Claim
58 words
A method according to claim 1 wherein said adjuvant is employed in combination with a waxy carrier having a softening point between about 70* and 200* F., the waxy carrier being present in an amount sufficient to impart the desired degree of hardness to the composition when said composition is applied to the surface of the dryer drum.
Claim 6
Dependent Claim
51 words
A method according to claim 6 wherein said adjuvant is employed in combination with a waxy carrier selected from the group consisting of stearic acid, stearyl alcohol, palmitic acid, palmityl alcohol, and ethoxylated derivatives of these acids and alcohols, polyethylene glycol having a molecular weight of 1,000 to 5,000 and hydrocarbons.
Claim 7
Dependent Claim
28 words
A method according to claim 1 wherein said cloth adjuvaNt is employed in combination with a waxy carrier having a melting point between about 90* and 100* F.
Claim 8
Dependent Claim
25 words
A method according to claim 1 wherein said adjuvant is sprayed onto the interior surface of said dryer drum by means of an aerosol spray.
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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) | 1975-03-21 | 1975-09-20 | 1976-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-21 | 1979-09-20 | 1980-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-21 | 1983-09-20 | 1984-03-21 | $7700.00 | Window Closed / Lapsed |