US3711259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety device
Assignee: Dunlop Holdings Ltd
•
Filing: 1970-03-10
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Granted: 1973-01-16
•
Expires: 1990-03-10
Abstract
Abstract A FLAME ARRESTER WHICH COMPRISES CLOSURE MEANS FOR ALLOWING GAS TO PASS THERETHROUGH WHILE PREVENTING PASSAGE OF A FLAME AND RETAINING MEANS FOR RETAINING THE CLOSURE MEANS IN POSITION IN OR ADJACENT AN APERTURE OR PASSAGE AND IN WHICH THE CLOSURE MEANS COMPRISES A POROUS METAL AND/OR CERAMIC MATERIAL IN THE FORM OF A THREE-DIMENSIONAL NETWORK ARRANGED TO DEFINE A PLURALITY OF CELLULAR SPACED WHICH INTERCOMMUNICATE WITH ONE ANOTHER AND THE RETAINING MEANS COMPRISES A COMPRESSED PORTION OF THE THREE-DIMENSIONAL NETWORK OF THE CLOSURE MEANS. PREFERABLY THE CLOSURE MEMBER IS A RETICULATED POLYURETHANE FOAM WHICH HAS BEEN ELECTROPLATED WITH THE NICKEL OR IORN.
Inventors
- 👤 W Gurney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:49
CPC Classifications
A; A62; A62C; A62C4/00; A62C4/02; Y; Y10; Y10S; Y10S138/00; Y10S138/09
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |