William H. Ukers (author)
- Nicholas Felix Durant was granted a French patent on a percolator 1827 ⟨employing for the first time an inner tube for spraying the boiling water over the ground coffee⟩
Nicholas Felix Durant, a manufacturer in Chalons-sur-Marne, was granted a French patent on a percolator employing for the first time an inner tube for spraying the boiling water over the ground coffee
judge verdicts (2)
- groundedness 1.00 pass — The claim is directly stated in the passage. The exact sentence confirms that Nicholas Felix Durant was granted a French patent on a percolator in 1827, employing an inner tube for spraying boiling water over ground coffee, with all details matching the source text.
- qualifier_fidelity 1.00 pass — All qualifiers are faithful to the passage. The viewpoint is correctly attributed to the author (passage states facts without named attribution). The stance 'asserts' is appropriate as the passage presents this as a factual statement. The sentiment is neutral, matching the passage's tone. The time '1827' matches the passage exactly. The context accurately captures the distinguishing feature mentioned in the passage. The quote appears verbatim in the passage and properly supports the claim.
In 1827, Nicholas Felix Durant, a manufacturer of Chalons-sur-Marne, was granted a French patent on a "percolator" employing, for the first time, an inner tube to raise the boiling water for spraying over the ground coffee.
judge verdicts (2)
- groundedness 1.00 pass — The claim is directly stated in the passage. The quote provided matches exactly with the passage text, confirming that Nicholas Felix Durant was granted a French patent on a percolator in 1827 employing an inner tube.
- qualifier_fidelity 1.00 pass — All qualifiers are faithful to the passage. The viewpoint is correctly attributed to the author (the passage states this as fact, not attributed to a named source). The stance is 'asserts' which matches the passage's presentation. The sentiment is neutral, consistent with the factual tone. The time qualifiers (when: 1827, valid_from: 1827, valid_to: 1827) match the passage exactly. The context 'employing inner tube' accurately reflects the passage's specification that this was 'for the first time, an inner tube to raise the boiling water.' The quote is verbatim and directly supports the claim.