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Bibliographic data

Indications of the International Patent Classification (IPC)
(51)	INT.CL.: (2020.01)	E04B 1/00 G10K 11/00

Patent
(11)	Number of the document	6748
(13)	Kind of document	B
(21)	Application number	2018 035
(22)	Date of filing the application	2018-12-10
(41)	Date of publication of the application	2020-06-25
(45)	Date of publication of patent	2020-08-10

Applicant
(71)	Vilniaus Gedimino technikos universitetas, Saulėtekio al. 11, 10223 Vilnius, LT

Inventors
(72)	Pranas BALTRĖNAS, LT Raimondas GRUBLIAUSKAS, LT Olga KHRYSTOSLAVENKO, LT

Grantee
(73)	Vilniaus Gedimino technikos universitetas, Saulėtekio al. 11, 10223 Vilnius, LT

Attorney or representative
(74)

Title
(54)	ACOUSTIC DIFFUSER

Last renewal fee
	Payment date	Validity (years)	Amount
	2021-11-23	4	92.00 EUR

Legal status
	Patent lapsed (non-payment of fees)
	Invalidation date	2022-12-10