Patent US3169705A successfully refreshed from Google Patents.
US3169705A
Expired / Lapsed
US
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Devices for the continuous emission of active substances
Assignee: BASF Schweiz AG
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Filing: 1961-12-21
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Granted: 1965-02-16
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Expires: 1981-12-21
Abstract
No abstract record available.
Inventors
- 👤 Geiger Max
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:46
CPC Classifications
A; A01; A01N; A01N25/00; A01N25/18; A01M; A01M1/00; A01M1/20; A01M1/2022; A01M1/2027; A01M1/2044; A61; A61L; A61L9/00; A61L9/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A DEVICE FOR THE CONTINUOUS AND EVEN EMISSION OF BIOLOGICALLY ACTIVE SUBSTANCES CONSISTING OF (A) A PLASTIC SUPPLY VESSEL HAVING POLYETHYLENE WALLS IMPERMEABLE FOR THE LIQUID CONTAINING THE ACTIVE SUBSTANCE, THE NECK OF WHICH VESSEL IS CLOSED BEFORE USE BY A STOPPER REMOVABLE BY SQUEEZING THE SIDES OF THE SUPPLY VESSEL TOGETHER AND SO EXPELLING THE STOPPER FROM THE NECK INTO THE DIFFUSION CANDLE SET FORTH BELOW UNDER (B), AND (B) A PLASTIC DIFFUSION CANDLE DRAWN OVER THE NECK OF THE SUPPLY VESSEL AND CONSISTING OF POLYVINYL CHLORIDE, WHICH DIFFUSION CANDLE IS IN THE FORM OF A TUBE CLOSED ON ONE END, AND THE WALLS OF WHICH ARE OF A HOMOGENOUS STRUCTURE THAT PERMITS DIFFUSION OF A SMALL STEADY AMOUNT OF THE ACTIVE SUBSTANCE.
Claim 2
Independent Claim
124 words
A DEVICE FOR THE CONTINUOUS AND EVEN EMISSION OF BIOLOGICALLY ACTIVE SUBSTANCES CONSISTING OF (A) A PLASTIC SUPPLY VESSEL HAVING POLYETHYLENE WALLS IMPERMEABLE FOR THE LIQUID CONTAINING THE ACTIVE SUBSTANCE, THE NECK OF WHICH VESSEL IS CLOSED BEFORE USE BY A STOPPER REMOVABLE BY SQUEEZING THE SIDES OF THE SUPPLY VESSEL TOGETHER AND SO EXPELLING THE STOPPER FROM THE NECK INTO THE DIFFUSION CANDLE SET FORTH BELOW UNDER (B), AND (B) A PLASTIC DIFFUSION CANDLE DRAWN OVER THE NECK OF THE SUPPLY VESSEL AND CONSISTING OF POLYVINYL CHLORIDE, WHICH DIFFUSION CANDLE IS IN THE FORM OF A TUBE CLOSED ON ONE END, AND THE WALLS OF WHICH ARE OF A HOMOGENOUS STRUCTURE THAT PERMITS DIFFUSION OF A SMALL STEADY AMOUNT OF THE ACTIVE SUBSTANCE.
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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) | 1968-02-16 | 1968-08-17 | 1969-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-16 | 1972-08-17 | 1973-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-16 | 1976-08-17 | 1977-02-16 | $7700.00 | Window Closed / Lapsed |