Inventor
HAZARD ROBERT E
14 patents
⚠️ This page may combine multiple inventors who share the name “HAZARD ROBERT E”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
POLYTOP CORP
12 patentsUS4625898ADec 2, 1986
Dispensing closure employing living hinge with cams to momentarily deform hinge and recesses to accept cams
POLYTOP CORP121 citations96
US4124151ANov 7, 1978
Toggle type dispensing closure
POLYTOP CORP69 citations96
US4377247AMar 22, 1983
Dispensing closure employing living hinge
POLYTOP CORP100 citations95
US4220248ASep 2, 1980
Closure with hinged lid and cam and spring elements holding lid open or closed
POLYTOP CORP80 citations95
US4282991AAug 11, 1981
Dispensing closure seals
POLYTOP CORP30 citations92
US4081113AMar 28, 1978
Child resistant dispensing closure
POLYTOP CORP37 citations92
US4047643ASep 13, 1977
Safety dispensing closure with movable retainer
POLYTOP CORP36 citations92
US3977557AAug 31, 1976
Container-closure structure employing fitment to prevent closure removal
POLYTOP CORP48 citations92
US4219138AAug 26, 1980
Dispensing closure utilizing a sealing element supported by a washer spring
POLYTOP CORP26 citations82
US3957181AMay 18, 1976
Child resistant dispensing closure
POLYTOP CORP28 citations82
US4081108AMar 28, 1978
Tamper evident one-piece dispensing closures
POLYTOP CORP29 citations81
US3967764AJul 6, 1976
Child-resistant closures with limited spout accessibility
POLYTOP CORP13 citations73