Abstract: An angiosperm index-1 and an angiosperm index-2 are correlated to an age of a liquid hydrocarbon sample and can be used to distinguish oil age of Late Cretaceous (100-65 million years before present, or 100-65 Ma BP) vs. Paleogene (65-55 Ma BP) vs. Eocene or younger (<55 Ma BP). This method improves over existing methods that cannot distinguish oil age between Late Cretaceous and Miocene (ca. 100-5 Ma BP).

Abstract: An angiosperm index-1 and an angiosperm index-2 are correlated to an age of a liquid hydrocarbon sample and can be used to distinguish oil age of Late Cretaceous (100-65 million years before present, or 100-65 Ma BP) vs. Paleogene (65-55 Ma BP) vs. Eocene or younger (<55 Ma BP). This method improves over existing methods that cannot distinguish oil age between Late Cretaceous and Miocene (ca. 100-5 Ma BP).

Abstract: A lock, including an outer subassembly, an inner subassembly, a safety mechanism, and a clutch. The clutch includes a square transmission tube and a sub-clutch. The safety mechanism includes a brake rod and a drive device. The inner subassembly includes an inner baffle plate, an inner baffle plate cover, a cylindrical tube, a transmission frame, and an inner doorknob. The inner baffle plate is inserted in the inner baffle plate cover. The cylindrical tube fits rotations of the inner baffle plate and the inner baffle plate cover. The transmission frame is disposed at one end of the cylindrical tube, and the inner doorknob is disposed at the other end of the cylindrical tube. The drive device includes a transmission member, a drive member, a first spring, a second spring, and a positioning slot. The positioning slot is disposed on the cylindrical tube.

Abstract: A door lock including: an outer handle assembly; an inner handle assembly; a clutch disposed between the outer handle assembly and the inner handle assembly; and a safety mechanism disposed on the clutch. The inner handle assembly includes an inner baffle, an inner shielding cover, a hollow cylindrical passage, a transmission rack, and an inner handle. The clutch includes a transmission square tube and a sub-clutch part connected to the transmission square tube. The safety mechanism includes a brake bar and a driving unit which are disposed in the transmission square tube. The hollow cylindrical passage includes a side wall and a plurality of axial guide grooves disposed on the side wall. The driving unit includes a sleeve tube and an actuator disposed in the sleeve tube. The actuator includes a sliding positioning tongue disposed on the circumferential surface of the actuator.

Abstract: A lock, including an outer subassembly, an inner subassembly, a safety mechanism, and a clutch. The clutch includes a square transmission tube and a sub-clutch. The safety mechanism includes a brake rod and a drive device. The inner subassembly includes an inner baffle plate, an inner baffle plate cover, a cylindrical tube, a transmission frame, and an inner doorknob. The inner baffle plate is inserted in the inner baffle plate cover. The cylindrical tube fits rotations of the inner baffle plate and the inner baffle plate cover. The transmission frame is disposed at one end of the cylindrical tube, and the inner doorknob is disposed at the other end of the cylindrical tube. The drive device includes a transmission member, a drive member, a first spring, a second spring, and a positioning slot. The positioning slot is disposed on the cylindrical tube.