US3231004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective device for vent stack
Assignee: Zinklahoma Inc
•
Filing: 1964-01-06
•
Granted: 1966-01-25
•
Expires: 1984-01-06
Abstract
No abstract record available.
Inventors
- 👤 Robert D Reed
- 👤 Zink John Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:20
CPC Classifications
F; F23; F23J; F23J11/00; F23L; F23L17/00; F23L17/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
168 words
A VENT STACK AND A PROTECTIVE DEVICE CONSISTING OF, A SUBSTANTIALLY CYLINDRICAL UPRIGHT CONDUIT EXPOSED TO TRANSVERSE AIR CURRENTS FROM ANY DIRECTION, SAID CONDUIT HAVING AN OPEN UPPER END FOR ESCAPE OF GAS TO ATMOSPHERE, A SUBSTANTIALLY CYLINDRICAL WALL SURROUNDING AN UPPER END PORTION OF SAID CONDUIT IN SPACED RELATIONSHIP PROVIDING A SUBSTANTIALLY ANNULAR UNOBSTRUCTED SPACE BETWEEN THE EXTERIOR OF THE CONDUIT AND INTERIOR OF SAID WALL, MEANS JOINING THE PERIMETER OF SAID CONDUIT WITH THE LOWER PORTION OF SAID WALL PROVIDING CLOSURE OF THE LOWER END OF SAID ANNULAR SPACE, THERETHROUGH SPACED HAVING UNOBSTRUCTED CIRCULAR HOLES THERETHROUGH SPACED FROM EACH OTHER, SAID HOLES BEING ARRANGED IN SUBSTANTIALLY VERTICALLY ALIGNED CIRCUMFERENTIALLY SPACED ROWS THROUGHOUT SAID CYLINDRICAL WALL, THE HOLES OF ONE ROW BEING STAGGERED VERTICALLY WITH RESPECT TO THE HOLES OF AN ADJACENT ROW, ALL OF SAID HOLES HAVING SUBSTANTIALLY THE SAME FLOW COEFFICIENT, AND VERTICALLY EXTENDING TANGENTS OF THE HOLES IN ONE ROW FORMING VERTICAL CHORDS WITH RESPECT TO THE HOLES OF LATERALLY ADJACENT ROWS OF HOLES.
Claim 2
Dependent Claim
168 words
A VENT STACK AND A PROTECTIVE DEVICE CONSISTING OF, A SUBSTANTIALLY CYLINDRICAL UPRIGHT CONDUIT EXPOSED TO TRANSVERSE AIR CURRENTS FROM ANY DIRECTION, SAID CONDUIT HAVING AN OPEN UPPER END FOR ESCAPE OF GAS TO ATMOSPHERE, A SUBSTANTIALLY CYLINDRICAL WALL SURROUNDING AN UPPER END PORTION OF SAID CONDUIT IN SPACED RELATIONSHIP PROVIDING A SUBSTANTIALLY ANNULAR UNOBSTRUCTED SPACE BETWEEN THE EXTERIOR OF THE CONDUIT AND INTERIOR OF SAID WALL, MEANS JOINING THE PERIMETER OF SAID CONDUIT WITH THE LOWER PORTION OF SAID WALL PROVIDING CLOSURE OF THE LOWER END OF SAID ANNULAR SPACE, THERETHROUGH SPACED HAVING UNOBSTRUCTED CIRCULAR HOLES THERETHROUGH SPACED FROM EACH OTHER, SAID HOLES BEING ARRANGED IN SUBSTANTIALLY VERTICALLY ALIGNED CIRCUMFERENTIALLY SPACED ROWS THROUGHOUT SAID CYLINDRICAL WALL, THE HOLES OF ONE ROW BEING STAGGERED VERTICALLY WITH RESPECT TO THE HOLES OF AN ADJACENT ROW, ALL OF SAID HOLES HAVING SUBSTANTIALLY THE SAME FLOW COEFFICIENT, AND VERTICALLY EXTENDING TANGENTS OF THE HOLES IN ONE ROW FORMING VERTICAL CHORDS WITH RESPECT TO THE HOLES OF LATERALLY ADJACENT ROWS OF HOLES.
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) | 1969-01-24 | 1969-07-26 | 1970-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-24 | 1973-07-26 | 1974-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-24 | 1977-07-26 | 1978-01-25 | $7700.00 | Window Closed / Lapsed |