US3134544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dispenser having a resilient sponge and piston
Assignee: Individual
•
Filing: 1962-12-05
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Granted: 1964-05-26
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Expires: 1982-12-05
Abstract
No abstract record available.
Inventors
- 👤 David W M Copley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:24
CPC Classifications
B; B65; B65D; B65D47/00; B65D47/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
DISPENSING MEANS COMPRISING: A CONTAINER HAVING A BASE AND SIDE BUT BEING OPEN ENDED AT ITS TOP, A RESILIENT SPONGE OF POLYURETHANE FOAM HAVING AN OPEN CELL STRUCTURE AND EXPANED WITH BENZYL ALCOHOL DISPOSED WITHIN SAID CONTAINER CONTIGUOUS WITH ITS BASE, AND A PISTON FORMED OF MUTUALLY BONDED CELLULOSE ACETATE GRANULES VERTICALLY MOVABLE IN SAID CONTAINER ABOVE SAID RESILIENT SPONGE WHEREBY DEPRESSION OF SAID PISTON DISPLACES LIQUID WHEN RETAINED IN SAID SPONGE UPWARDLY INTO AND THROUGH SAID PISTON, BUT UPON RELEASE OR SAID PISTON SAID SPONGE URGES SAID PISTON UPWARDLY.
Claim 2
Dependent Claim
90 words
DISPENSING MEANS COMPRISING: A CONTAINER HAVING A BASE AND SIDE BUT BEING OPEN ENDED AT ITS TOP, A RESILIENT SPONGE OF POLYURETHANE FOAM HAVING AN OPEN CELL STRUCTURE AND EXPANED WITH BENZYL ALCOHOL DISPOSED WITHIN SAID CONTAINER CONTIGUOUS WITH ITS BASE, AND A PISTON FORMED OF MUTUALLY BONDED CELLULOSE ACETATE GRANULES VERTICALLY MOVABLE IN SAID CONTAINER ABOVE SAID RESILIENT SPONGE WHEREBY DEPRESSION OF SAID PISTON DISPLACES LIQUID WHEN RETAINED IN SAID SPONGE UPWARDLY INTO AND THROUGH SAID PISTON, BUT UPON RELEASE OR SAID PISTON SAID SPONGE URGES SAID PISTON UPWARDLY.
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) | 1967-05-26 | 1967-11-25 | 1968-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-26 | 1971-11-25 | 1972-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-26 | 1975-11-25 | 1976-05-26 | $7700.00 | Window Closed / Lapsed |