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Multilayer film for tamper indication by use of optical interference reflection 원문보기

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • B65D-101/00
  • G02B-001/10
  • B32B-007/00
출원번호 US-0814237 (1991-12-23)
발명자 / 주소
  • Wheatley John A. (Midland MI) Schrenk Walter J. (Midland MI)
출원인 / 주소
  • The Dow Chemical Company (Midland MI 02)
인용정보 피인용 횟수 : 87  인용 특허 : 0

초록 ▼

A multilayer film including contiguous layers of two or more diverse thermoplastic materials of differing refractive indices whereby the film retains a permanent color change as evidence of tampering or an attempt at tampering when the yield point of at least one of the diverse materials has been at

대표청구항 ▼

A multilayer optical interference film comprised of contiguous layers of two or more diverse thermoplastic materials of differing refractive indices whereby the film retains a permanent visual color change as evidence of tampering or an attempt at tampering when the yield point of at least one of th

이 특허를 인용한 특허 (87)

  1. Wortman, David L.; Cobb, Jr., Sanford; Cull, Brian D.; Weber, Michael F.; Ouderkirk, Andrew J., Backlight system with multilayer optical film reflector.
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  6. Toshine, Tetsuya; Ueda, Kenji, Counterfeit-proof volume hologram multilayer structure, and counterfeit-proof volume hologram seal.
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