Patent US2800908A successfully refreshed from Google Patents.
US2800908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of tobacco smoke
Assignee: Individual
•
Filing: 1955-09-29
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Granted: 1957-07-30
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Expires: 1975-09-29
Abstract
No abstract record available.
Inventors
- 👤 Blank Samuel
- 👤 Frederick O Zillessen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:01
CPC Classifications
A; A24; A24D; A24D3/00; A24D3/06; A24D3/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
THE METHOD OF TREATING TOBACCO SMOKE TO REDUCE THE PROPORTION OF HARMFUL COMPONENTS THEREIN WHICH COMPRISES CONTACTING THE SMOKE WITH AN ION-EXCHANGE RESIN ON WHICH IS ADSORBED CERIUM IN THE CERIC STATE.
Claim 2
Independent Claim
32 words
THE METHOD OF TREATING TOBACCO SMOKE TO REDUCE THE PROPORTION OF HARMFUL COMPONENTS THEREIN WHICH COMPRISES CONTACTING THE SMOKE WITH AN ION-EXCHANGE RESIN ON WHICH IS ADSORBED CERIUM IN THE CERIC STATE.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-29 | 1961-01-28 | 1961-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-29 | 1965-01-28 | 1965-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-29 | 1969-01-28 | 1969-07-30 | $7700.00 | Window Closed / Lapsed |