William H. Ukers (author)
Abel Stillman, Poland, N.Y., is granted a United States patent on a family coffee roaster having a mica window to enable the operator to observe the coffee while roasting.
judge verdicts (2)
- groundedness 1.00 pass — The claim is directly stated in the passage. The exact quote provided matches the passage text verbatim, confirming that Abel Stillman was granted a United States patent on a family coffee roaster in 1840.
- qualifier_fidelity 1.00 pass — All qualifiers are faithful to the passage. The viewpoint is correctly attributed to the author (not a named source); the stance is appropriately 'asserts'; sentiment is neutral; the time is accurately set to 1840 with valid_from matching and valid_to as null (no end date given); context correctly specifies Poland, New York, United States; and the quote appears verbatim in the passage and directly supports the claim.