Patent US2327764A successfully refreshed from Google Patents.
Patent US3356255A successfully refreshed from Google Patents.
US3356255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Breather and drain
Assignee: —
•
Filing: —
•
Granted: 1967-12-05
•
Expires: 1984-12-05
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:22
CPC Classifications
F; F16; F16L; F16L55/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
A BREATHER DEVICE COMPRISING A BODY HAVING EXTERNAL THREADS FOR THREADING INTO A WALL, A HEAD ON ONE END OF THE BODY, A RECESS IN THE OPPOSITE END OF THE BODY, A UNITARY POROUS SLUG IN THE RECESS, STOP MEANS TO HOLD THE SLUG WITHIN THE RECESS AND AGAINST WHICH THE SLUG SEATS UNDER EXPLOSIVE PRESSURES, THE PORES IN THE SLUG PROVIDING A PLURALITY OF LONG AND NARROW TORTUOUS PASSAGEWAYS CAPABLE OF PASSING GASES BUT NOT FLAME THROUGH THEM, THE SLUG HAVING AN END FACING THE HEAD AND AN END OPPOSITE THE HEAD OF THE BODY, A RECESS IN EACH END OF THE SLUG TO INCREASE THE SURFACE AREAS BY WHICH GASES CAN PASS TO AND FROM THE SLUG, AND A PLURALITY OF PASSAGE COMMUNICATING WITH THE RECESS AND OPENING THROUGH THE BODY ADJACENT THE HEAD THEREOF.
Claim 2
Dependent Claim
137 words
A BREATHER DEVICE COMPRISING A BODY HAVING EXTERNAL THREADS FOR THREADING INTO A WALL, A HEAD ON ONE END OF THE BODY, A RECESS IN THE OPPOSITE END OF THE BODY, A UNITARY POROUS SLUG IN THE RECESS, STOP MEANS TO HOLD THE SLUG WITHIN THE RECESS AND AGAINST WHICH THE SLUG SEATS UNDER EXPLOSIVE PRESSURES, THE PORES IN THE SLUG PROVIDING A PLURALITY OF LONG AND NARROW TORTUOUS PASSAGEWAYS CAPABLE OF PASSING GASES BUT NOT FLAME THROUGH THEM, THE SLUG HAVING AN END FACING THE HEAD AND AN END OPPOSITE THE HEAD OF THE BODY, A RECESS IN EACH END OF THE SLUG TO INCREASE THE SURFACE AREAS BY WHICH GASES CAN PASS TO AND FROM THE SLUG, AND A PLURALITY OF PASSAGE COMMUNICATING WITH THE RECESS AND OPENING THROUGH THE BODY ADJACENT THE HEAD THEREOF.
References Cited (Backward Citations)
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Cited
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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) | 1970-12-04 | 1971-06-05 | 1971-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-04 | 1975-06-05 | 1975-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-04 | 1979-06-05 | 1979-12-05 | $7700.00 | Window Closed / Lapsed |