Patent US3871746A successfully refreshed from Google Patents.
US3871746A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal cell
Assignee: AGC Inc
•
Filing: 1973-06-06
•
Granted: 1975-03-18
•
Expires: 1993-06-06
Abstract
Abstract A liquid crystal cell which is formed from a pair of plates, at least one of which is transparent, and wherein the space between said plates is filled with a liquid crystal material and wherein said plates are sealed with a sealant made of tetrafluoroethylene-ethylene-copolymer or a chlorotrifluoroethylene-ethylene-copolymer.
Inventors
- 👤 Ryujiro Muto
- 👤 Shigemasa Furuuchi
- 👤 Hiroshi Ukihashi
- 👤 Katsuo Uchijima
- 👤 Hiromichi Nishimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:05
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1339; C; C09; C09K; C09K2323/00; C09K2323/05; C09K2323/057
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
50 words
IN A LIQUID CRYSTAL CELL FILLED WITH A LIQUID CRYSTAL MATERIAL BETWEEN THE PAIR OF PLATES SEALED WITH A SEALANT AND DISPOSED AT A DESIGNATED DISTANCE FROM ONE ANOTHER BY A SPACING ELEMENT THEREFOR, THE IMPROVEMENT WHICH COMPRISES TJ HE USE OF A SEALANT OF TETRAFLUOROETHYLENE-ETHYLENE COPOLYMER OR CHLOROTRIFLUOROETHYLENE-ETHYLENE COPOLYMER.
Claim 2
Dependent Claim
50 words
IN A LIQUID CRYSTAL CELL FILLED WITH A LIQUID CRYSTAL MATERIAL BETWEEN THE PAIR OF PLATES SEALED WITH A SEALANT AND DISPOSED AT A DESIGNATED DISTANCE FROM ONE ANOTHER BY A SPACING ELEMENT THEREFOR, THE IMPROVEMENT WHICH COMPRISES TJ HE USE OF A SEALANT OF TETRAFLUOROETHYLENE-ETHYLENE COPOLYMER OR CHLOROTRIFLUOROETHYLENE-ETHYLENE COPOLYMER.
Claim 3
Dependent Claim
39 words
The liquid crystal cell of claim 1, wherein the copolymer is a tetrafluoroethylene-ethylene copolymer having a mole ratio of tetrafluoroethylene component to ethylene component ranging from 40/60 - 70/30 and a volumetric flow rate of 30 - 300 mm3/sec.
Claim 4
Dependent Claim
39 words
The liquid crystal cell of claim 1, wherein the copolymer is a chlorotrifluoroethylene-ethylene copolymer having a mole ratio of chlorotrifluoroethylene component to ethylene component ranging from 40/60 - 70/30 and a volumetric flow rate of 30 - 300 mm3/sec..
Claim 5
Dependent Claim
32 words
The liquid crystal cell of claim 1, wherein the plates of said liquid crystal cell are sealed with the combination of said spacing element with the tetrafluoroethylene-ethylene copolymer or the chlorotrifluoroethylene-ethylene copolymer.
Claim 6
Dependent Claim
18 words
The liquid crystal cell of claim 2, wherein said spacing element is used in combination with said sealant.
Claim 7
Dependent Claim
18 words
The liquid crystal cell of claim 1, wherein said spacing element is used in combination with said sealant.
Claim 8
Dependent Claim
24 words
The liquid crystal cell of claim 4, wherein said spacing element is glass beads having an average diameter of 5 - 50 Mu .
Claim 9
Dependent Claim
24 words
The liquid crystal cell of claim 4, wherein said spacing element is ceramic beads having an average diameter of 5 - 50 Mu .
Claim 10
Dependent Claim
24 words
The liquid crystal cell of claim 4, wherein said spacing element is metal balls having an average diameter of 5 - 50 Mu .
Claim 11
Dependent Claim
24 words
The liquid crystal cell of claim 4, wherein said spacing element is plastic beads having an average diameter of 5 - 50 Mu .
References Cited (Backward Citations)
US3441513A
Cited
US3620889A
Cited
US3600061A
Cited
US3594126A
Cited
US3625591A
Cited
US3661444A
Cited
US3647279A
Cited
US3765747A
Cited
US3781087A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |