Patent US3032445A successfully refreshed from Google Patents.
US3032445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tobacco smoke filters
Assignee: Union Carbide Corp
•
Filing: 1959-06-24
•
Granted: 1962-05-01
•
Expires: 1979-06-24
Abstract
No abstract record available.
Inventors
- 👤 Ray C Hamon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:21
CPC Classifications
A; A24; A24D; A24D3/00; A24D3/06; A24D3/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
AS AN ARTICLE OF MANUFACTURE, A TOBACCO SMOKE FILTERING ELEMENT COMPRISING A MATERIAL WHICH IS A MEMBER SELECTED FROM THE CLASS CONSISTING OF (A) SOLID POLY(EHTYLENE OXIDE) AND (B) SOLID COPOLYMERS COMPRISED OF AT LEAST 50 WEIGHT PERCENT OF ETHYLENE OXIDE IN COPOLYMERIZED FORM WITH UP TO 50 WEIGHT PERCENT OF LOWER OLEFIN OXIDES, SAID MATERIAL BEING DISPOSED WITHIN AN ENCLOSURE, WHEREBY TOBACCO SMOKE PASSES THROUGH SAID FILTERING ELEMENT AND OBJECTIONABLE CONSTITUENTS ARE REMOVED THEREFROM.
Claim 2
Dependent Claim
75 words
AS AN ARTICLE OF MANUFACTURE, A TOBACCO SMOKE FILTERING ELEMENT COMPRISING A MATERIAL WHICH IS A MEMBER SELECTED FROM THE CLASS CONSISTING OF (A) SOLID POLY(EHTYLENE OXIDE) AND (B) SOLID COPOLYMERS COMPRISED OF AT LEAST 50 WEIGHT PERCENT OF ETHYLENE OXIDE IN COPOLYMERIZED FORM WITH UP TO 50 WEIGHT PERCENT OF LOWER OLEFIN OXIDES, SAID MATERIAL BEING DISPOSED WITHIN AN ENCLOSURE, WHEREBY TOBACCO SMOKE PASSES THROUGH SAID FILTERING ELEMENT AND OBJECTIONABLE CONSTITUENTS ARE REMOVED THEREFROM.
References Cited (Backward Citations)
US638088A
Cited
GB654994A
Cited
US2639715A
Cited
US2881769A
Cited
US2881771A
Cited
US2870100A
Cited
US2933459A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-30 | 1965-10-30 | 1966-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-30 | 1969-10-30 | 1970-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-30 | 1973-10-30 | 1974-05-01 | $7700.00 | Window Closed / Lapsed |