US3839220A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microcapsules for use in pressurized systems
Assignee: Mennen Co
•
Filing: 1971-11-08
•
Granted: 1974-10-01
•
Expires: 1991-11-08
Abstract
Abstract Active substances are stored in pressurized storage systems encapsulated in microcapsules having internal pressures sufficient to burst the microcapsules, and thus release the other substances, upon removal from the system.
Inventors
- 👤 M Barchas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:59
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/30; A; A61; A61K; A61K8/00; A61K8/02; A61K8/11; A61Q; A61Q5/00; A61Q5/08; A61Q5/10; A61Q9/00; A61Q9/02; C01; C01B; C01B15/00; C01B15/055; C01B15/10; C01B15/106; C08; C08F; C08F283/00; C08F283/01; C08G; C08G18/00; C08G18/06; C08G18/08; C08G59/00; C08G59/18; C08G59/188; A61K2800/00; A61K2800/20; A61K2800/24; A61K2800/242; A61K2800/40; A61K2800/41; A61K2800/412
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
149 words
A SYSTEM FOR STORING TWO ACTIVE SUBSTANCES WHICH ARE REACTIVE WITH ONE ANOTHER COMPRISING AN AEROSOL CONTAINER CONTAINING SAID SUBSTANTCES, A LIQUID AEROSOL PROPELLANT IN SAID CONTAINER UNDER PRESSURE AND A MULTIPLICITY OF MICROCAPSULES HAVING SOLID WALLS IN SAID CONTAINER, AT LEAST SOME OF SAID MICROPCAPSULES CONTAINING AN ENCAPSULATE CONSISTING ESSENTIALLY OF ONE OF SAID ACTIVE SUBSTANCES AND BURSTING FLUID SELECTED FROM THE GROUP CONSISTING OF FLUOROCARBONS, HYDROCARBONS, METHYLENE CHLORIDE, VINYLCHLORIDE, DIMETHYL ETHER AND MIXTURES THEREOF, SAID BURSTING FLUID BEING PRESENT IN AN AMOUNT AND HAVING A VAPOR PRESSURE SUCH THAT THE PRESSURE INSIDE SAID MICROCAPSULES IS NOT SUBSTANTIALLY DIFFERENT FROM THE PRESSURE OF SAID PROPELLANT IN SAID CONTAINER, BUT IS SUFFICIENTLY GREATER THAN THE PRESSURE PREVAILING OUTSIDE SAID CONTAINER UNDER NORMAL CONDITIONS OF USE TO CAUSE BURSTING OF SAID CAPSULES UPON THEIR DISCHARGE FROM SAID CONTAINER, SUBSTANTIALLY ALL OF SAID ONE SUBSTANCE IN SAID CONTAINER BEING IN MICROCAPSULES.
Claim 2
Independent Claim
149 words
A SYSTEM FOR STORING TWO ACTIVE SUBSTANCES WHICH ARE REACTIVE WITH ONE ANOTHER COMPRISING AN AEROSOL CONTAINER CONTAINING SAID SUBSTANTCES, A LIQUID AEROSOL PROPELLANT IN SAID CONTAINER UNDER PRESSURE AND A MULTIPLICITY OF MICROCAPSULES HAVING SOLID WALLS IN SAID CONTAINER, AT LEAST SOME OF SAID MICROPCAPSULES CONTAINING AN ENCAPSULATE CONSISTING ESSENTIALLY OF ONE OF SAID ACTIVE SUBSTANCES AND BURSTING FLUID SELECTED FROM THE GROUP CONSISTING OF FLUOROCARBONS, HYDROCARBONS, METHYLENE CHLORIDE, VINYLCHLORIDE, DIMETHYL ETHER AND MIXTURES THEREOF, SAID BURSTING FLUID BEING PRESENT IN AN AMOUNT AND HAVING A VAPOR PRESSURE SUCH THAT THE PRESSURE INSIDE SAID MICROCAPSULES IS NOT SUBSTANTIALLY DIFFERENT FROM THE PRESSURE OF SAID PROPELLANT IN SAID CONTAINER, BUT IS SUFFICIENTLY GREATER THAN THE PRESSURE PREVAILING OUTSIDE SAID CONTAINER UNDER NORMAL CONDITIONS OF USE TO CAUSE BURSTING OF SAID CAPSULES UPON THEIR DISCHARGE FROM SAID CONTAINER, SUBSTANTIALLY ALL OF SAID ONE SUBSTANCE IN SAID CONTAINER BEING IN MICROCAPSULES.
Claim 3
Dependent Claim
24 words
The system claimed in claim 1 wherein the bursting fluid is trichlorofluoromethane, difluorodichloromethane, tetrafluoromethane, dichlorofluoromethane, chlorodifluoromethane, fluoroform, trichlorotrifluoroethane, dichlorotetrafluoroethane, chloropentafluoroethane, hexafluoroethane, or mixtures thereof.
Claim 4
Dependent Claim
17 words
The system claimed in claim 1 wherein the bursting fluid is propane, n-butane, i-butane, or mixtures thereof.
Claim 5
Dependent Claim
16 words
The system claimed in claim 1, wherein the bursting fluid is methylene chloride or dimethyl ether.
Claim 6
Dependent Claim
46 words
The pressurized system of claim 1, wherein the system contains a shave cream and at least two active substances which in combination are capable of reacting exothermically to provide sensible heat to the shave cream, at least one of said active substances being encapsulated in microcapsules.
Claim 7
Dependent Claim
20 words
The pressurized self-heating shave cream system of claim 5, wherein said active substances include an oxidant and a reducing agent.
Claim 8
Dependent Claim
39 words
The pressurized self-heating shave cream system of claim 6, wherein said oxidant is selected from the group consisting of sodium percarbonate and potassium percarbonate and is encapsulated within microcapsules having polyolefin walls, and wherein said bursting fluid comprises dichlorodifluoromethane.
Claim 9
Dependent Claim
38 words
The pressurized system of claim 1, wherein the system contains at least two active substances which in combination are capable of reacting to form a hair dye, at least one of said active substances being encapsulated in microcapsules.
Claim 10
Dependent Claim
55 words
The pressurized hair dye system of claim 8, wherein said active substances include at least one dye intermediate, selected from the group consisting of aromatic amines and aromatic phenols, and a developer selected from the group consisting of hydrogen peroxide, sodium percarbonate and potassium percarbonate, and wherein said developer is encapsulated in said pressurized microcapsules.
Claim 11
Dependent Claim
32 words
The pressurized system of claim 1, wherein the system contains active hair bleach component substances, comprising aqueous ammonia and hydrogen peroxide, at least one of said active substances being encapsulated in microcapsules.
Claim 12
Dependent Claim
37 words
The pressurized system of claim 1, wherein the system contains at least two active substances which in combination are capable of reacting to form an adhesive, at least one of said active substances being encapsulated in microcapsules.
Claim 13
Dependent Claim
23 words
The pressurized system of claim 11 wherein the bursting fluid is trichlorofluoromethane, difluorochloromethane, tetrafluoromethane, dichlorofluoromethane, chlorodifluoromethane, fluoroform, trichlorotrifluoroethane, dichlorofluoroethane, hexafluoroethane or mixtures thereof.
Claim 14
Dependent Claim
18 words
The pressurized system of claim 11 wherein the bursting fluid is propane, i-butane or n-butane or mixtures thereof.
Claim 15
Dependent Claim
17 words
The pressurized system of claim 11 wherein the active substances are capable of forming an epoxy adhesive.
Claim 16
Dependent Claim
36 words
The pressurized system of claim 1, wherein the system contains at least two active substances which are capable of reacting to form a polyurethane foam, at least one of said active substances being encapsulated in microcapsules.
Claim 17
Dependent Claim
33 words
The pressurized system of claim 1, wherein the system contains at least two active substances capable of reacting to form a nylon, at least one of said active substances being encapsulated in microcapsules.
Claim 18
Dependent Claim
33 words
The pressurized system of claim 1, wherein the system contains at least two active substances capable of reacting to form a polyurea, at least one of said active substances being encapsulated in microcapsules.
Claim 19
Dependent Claim
24 words
The pressurized system of claim 1, wherein the system contains a first paint encapsulated in microcapsules, and a second paint of a different color.
References Cited (Backward Citations)
US2524590A
Cited
US3679102A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-30 | 1978-04-01 | 1978-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-30 | 1982-04-01 | 1982-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-30 | 1986-04-01 | 1986-10-01 | $7700.00 | Window Closed / Lapsed |