US3799398A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for packaging products which are to be stored separately but dispensed simultaneously
Assignee: L'Oréal SA
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Filing: 1971-11-23
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Granted: 1974-03-26
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Expires: 1991-11-23
Abstract
Abstract A dispenser for packaging two products which must be stored separately but mixed when dispensed, said dispenser comprising an outer container and an inner container within said outer container, said inner container being provided with closure means which opens in response to a difference between the pressure in said outer container and that in said inner container, and means for creating such a pressure difference.
Inventors
- 👤 B Morane
- 👤 M Maurelli
- 👤 R Sathicq
- 👤 C Paoletti
- 👤 L Merrien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:29
CPC Classifications
B; B65; B65D; B65D83/00; B65D83/14; B65D83/60; B65D83/64; B65B; B65B29/00; B65B29/10; B65B31/00; B65B31/003; B65D83/141; B65D83/42; B65D83/425; B65D83/68; B65D83/682; B65D83/687; B65B2230/00; B65B2230/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
104 words
A dispenser for packaging two products which must be stored separately but mixed when dispensed, said dispenser comprising an outer container, with each container holding under greater than atmospheric pressure a product substantially absent from the other container, said inner container being provided with closure means which opens to permit mixing of said products in response to a difference between the pressure in said outer container and that in said inner container, and means for releasing the pressure in one of said containers to create such a pressure difference by changing the quantity of a third product under pressure within one of said containers.
Claim 2
Dependent Claim
104 words
A dispenser for packaging two products which must be stored separately but mixed when dispensed, said dispenser comprising an outer container, with each container holding under greater than atmospheric pressure a product substantially absent from the other container, said inner container being provided with closure means which opens to permit mixing of said products in response to a difference between the pressure in said outer container and that in said inner container, and means for releasing the pressure in one of said containers to create such a pressure difference by changing the quantity of a third product under pressure within one of said containers.
Claim 3
Dependent Claim
23 words
A dispenser as claimed in claim 1 in which said pressure relieving means is a valve in the wall of said outer container.
Claim 4
Dependent Claim
36 words
A dispenser as claimed in claim 2 in which said valve is the dispensing outlet for said dispenser and equipped with a signal adapted to indicate whether a gas or liquid is passing through said valve.
Claim 5
Dependent Claim
40 words
A dispenser as claimed in claim 1 in which said inner container is a tube made of flexible material provided with a folded over end which unrolls when the pressure in said tube is greater than that outside said tube.
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) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |