US 12,226,981 B2
Dual shell dental appliance and material constructions
Ray F. Stewart, Blairsden, CA (US); and John Lahlouh, San Jose, CA (US)
Assigned to Bay Materials, LLC, Fremont, CA (US)
Filed by Bay Materials, LLC, Fremont, CA (US)
Filed on May 15, 2024, as Appl. No. 18/665,355.
Application 18/665,355 is a continuation of application No. 18/061,056, filed on Dec. 2, 2022, granted, now 11,999,141.
Application 18/061,056 is a continuation of application No. 17/564,857, filed on Dec. 29, 2021, granted, now 11,541,643, issued on Jan. 3, 2023.
Application 17/564,857 is a continuation of application No. 17/221,216, filed on Apr. 2, 2021, granted, now 11,325,358, issued on May 10, 2022.
Application 17/221,216 is a continuation of application No. 17/092,763, filed on Nov. 9, 2020, granted, now 10,987,907, issued on Apr. 27, 2021.
Application 17/092,763 is a continuation of application No. 16/719,256, filed on Dec. 18, 2019, granted, now 10,870,263, issued on Dec. 22, 2020.
Application 16/719,256 is a continuation in part of application No. 16/211,176, filed on Dec. 5, 2018, granted, now 10,549,511, issued on Feb. 4, 2020.
Application 16/211,176 is a continuation in part of application No. PCT/US2018/035384, filed on May 31, 2018.
Claims priority of provisional application 62/590,627, filed on Nov. 26, 2017.
Claims priority of provisional application 62/512,786, filed on May 31, 2017.
Prior Publication US 2024/0300222 A1, Sep. 12, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. B32B 27/08 (2006.01); A61C 7/08 (2006.01); B32B 27/30 (2006.01); B32B 27/32 (2006.01); B32B 27/36 (2006.01); B32B 27/40 (2006.01)
CPC B32B 27/08 (2013.01) [A61C 7/08 (2013.01); B32B 27/302 (2013.01); B32B 27/32 (2013.01); B32B 27/36 (2013.01); B32B 27/40 (2013.01); B32B 2250/24 (2013.01); B32B 2307/536 (2013.01); B32B 2307/546 (2013.01); B32B 2535/00 (2013.01)] 30 Claims
OG exemplary drawing
 
1. A dental appliance, comprising:
an elastomer layer comprising an aromatic polyether polyurethane having a glass transition temperature and/or melting point of from 180° C. to 220° C. and a hardness of from A 80 to D75;
a first thermoplastic polymer layer comprising a copolyester of terephthalic acid, cyclohexane dimethanol, and 2,2,4,4-tetramethyl-1,3-cyclobutanediol having a glass transition temperature and/or melting point of 100° C. to 120° C., a flexural modulus of from 1,000 MPa to 1,600 MPa and a hardness of from R100 to R115; and
a second thermoplastic polymer layer comprising a copolyester.