US3826221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Closures for containers
Assignee: UCB Pharma Ltd
•
Filing: 1972-06-13
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Granted: 1974-07-30
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Expires: 1992-06-13
Abstract
Abstract A closure cap for a container has an aperture normally covered by a seal which is capable of being peeled off the cap to expose the aperture. At least part of the seal is arranged to change colour when the cap is exposed to heat.
Inventors
- 👤 C Ross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:19
CPC Classifications
B; B65; B65D; B65D51/00; B65D51/24; B65D79/00; B65D79/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
An infusion liquid container, an opening thereinto and a closure cap over the opening, the cap being apertured to communicate with the container interior, a seal for the closure cap, the seal having a component extending beyond the marginal edge of the cap to provide an easily manipulable pull-tab to facilitate the removal of the seal and allow removal of the container contents, the underside of the seal in that portion thereof which overlies the margin of the cap aperture being provided with adhesive material, the underside of the pull-tab being free of adhesive material, and a portion of the upper surface of the seal overlying the cap aperture being provided with a temperature responsive, color-changing indicator to signal the readiness for use of the container contents upon appropriate heat treatment thereof.
Claim 2
Dependent Claim
132 words
An infusion liquid container, an opening thereinto and a closure cap over the opening, the cap being apertured to communicate with the container interior, a seal for the closure cap, the seal having a component extending beyond the marginal edge of the cap to provide an easily manipulable pull-tab to facilitate the removal of the seal and allow removal of the container contents, the underside of the seal in that portion thereof which overlies the margin of the cap aperture being provided with adhesive material, the underside of the pull-tab being free of adhesive material, and a portion of the upper surface of the seal overlying the cap aperture being provided with a temperature responsive, color-changing indicator to signal the readiness for use of the container contents upon appropriate heat treatment thereof.
References Cited (Backward Citations)
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US1826115A
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US2889799A
Cited
US2932971A
Cited
US2953921A
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US3067015A
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Cited
US3659739A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-29 | 1978-01-28 | 1978-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-29 | 1982-01-28 | 1982-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-29 | 1986-01-28 | 1986-07-30 | $7700.00 | Window Closed / Lapsed |