Patent ID: 11939526
Assignee: SUNCOKE TECHNOLOGY AND DEVELOPMENT LLC
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  B  F  Y | IPC B  C  F

Claim 12:
13. A method of sealing a vent stack, the method comprising:
providing a vent stack lid including a first lid portion, a first sealing portion coupled to the first lid portion, a second lid portion, and a second sealing portion coupled to the second lid portion, wherein:
when the vent stack is in a closed position, the second lid portion is spaced apart from the first lid portion to define a space between the first and second lid portions,
the vent stack lid includes a first side configured to be in contact with an operation fluid and a second side, opposite the first side, exposed to atmosphere,
the first sealing portion includes, at the second side, a first material that is flexible and a second material that is rigid, and
when the vent stack is in the closed position, the second material at least partially overlaps (i) the space between the first and second lid portions, (ii) at least a portion of the first lid portion, and (iii) at least a portion of the second lid portion; and

positioning the second sealing portion to at least partially overlap the first sealing portion over the space between the first and second lid portions.