US3922440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety glass light control medium
Assignee: 3M Co
•
Filing: 1974-08-16
•
Granted: 1975-11-25
•
Expires: 1994-08-16
Abstract
Abstract A humidity-resistant shatter-resistant light control medium comprises a light collimating film with cellulose acetate or cellulose acetate-butyrate surfaces having bonded to those surfaces a polymeric adhesive obtained from the polymerization of monomers comprising 1. 50-80% BY WEIGHT TOTAL MONOMER ALKYL ACRYLATE HAVING 1 TO 8 CARBON ATOMS IN THE ALKYL SUBSTITUENT AND/OR TETRAHYDROFURFURYL ACRYLATE; 2. 20-50% OF MONOMERS FURTHER COMPRISING A. 0 TO 50% BY TOTAL WEIGHT OF MONOMER N-alkylacrylamide and/or N-alkylmethacrylamide, wherein the alkyl groups thereof have 1 to 8 carbon atoms, and B. 0 TO 50% BY TOTAL WEIGHT OF MONOMERS N-vinyl-2-pyrrolidone, THE ADHESIVE LAYER FURTHER BONDED TO A TRANSPARENT, PROTECTIVE COVERING MATERIAL.
Inventors
- 👤 Arthur A Wegwerth
- 👤 R Dean Lowrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:37
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/1055; B32B17/10761; B32B17/10009; B32B17/10018; B32B27/00; B32B27/06; B32B27/08; C; C09; C09J; C09J133/00; C09J133/04; C09J133/06; C09J133/08; C09J7/00; C09J7/20; C09J7/22; C09J7/30; C09J7/38; G; G02; G02B; G02B1/00; G02B1/10; G02B1/14; B32B2317/00; B32B2317/18; C09J2301/00; C09J2301/10; C09J2301/16; C09J2301/162; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31507; Y10T428/31551; Y10T428/31627; Y10T428/3163; Y10T428/31786; Y10T428/3179; Y10T428/31797; Y10T428/31855; Y10T428/31859; Y10T428/31909
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
105 words
A HUMIDITY-RESISTANT SHATTER-RESISTANT LIGHT CONTROL MEDIUM COMPRISING A LIGHT COLLIMATING FILM WITH CELLULOSE ACETATE OR CELLULOSE ACETATE-BUTYRATE SURFACES HAVING BONDED TO THOSE SURFACES A POLYMERIC ADHESIVE OBTAINED FROM THE POLYMERIZATION OF MONOMERS COMPRISING 1. 50-80% BY WEIGHT TOTAL MONOMER ALKYL ACRYLATE HAVING 1 TO 8 CARBON ATOMS IN TEH ALKYL SUBSTITUTED AND/OR TETRAHYDROFUFURYL ACRYLATE, 2. 20-50% OF MONOMERS FURTHER COMPRISING A. 0 TO 50% BY TOTAL WEIGHT OF MONOMER N-ALKYLACRYLAMIDE AND/OR N-ALKYLMETHACRYLAMIDE, WHEREIN THE ALKYL GROUPS THEREOF HAVE 1 TO 8 CARBON ATOMS, AND B. 0 TO 50% BY TOTAL WEIGHT OF MONOMERS N-VINYL-2:PYRROLIDONE, THE ADHESIVE LAYER FURTHER BONDED TO A TRANSPARENT, PROTECTIVE COVERING MATERIAL.
Claim 2
Dependent Claim
105 words
A HUMIDITY-RESISTANT SHATTER-RESISTANT LIGHT CONTROL MEDIUM COMPRISING A LIGHT COLLIMATING FILM WITH CELLULOSE ACETATE OR CELLULOSE ACETATE-BUTYRATE SURFACES HAVING BONDED TO THOSE SURFACES A POLYMERIC ADHESIVE OBTAINED FROM THE POLYMERIZATION OF MONOMERS COMPRISING 1. 50-80% BY WEIGHT TOTAL MONOMER ALKYL ACRYLATE HAVING 1 TO 8 CARBON ATOMS IN TEH ALKYL SUBSTITUTED AND/OR TETRAHYDROFUFURYL ACRYLATE, 2. 20-50% OF MONOMERS FURTHER COMPRISING A. 0 TO 50% BY TOTAL WEIGHT OF MONOMER N-ALKYLACRYLAMIDE AND/OR N-ALKYLMETHACRYLAMIDE, WHEREIN THE ALKYL GROUPS THEREOF HAVE 1 TO 8 CARBON ATOMS, AND B. 0 TO 50% BY TOTAL WEIGHT OF MONOMERS N-VINYL-2:PYRROLIDONE, THE ADHESIVE LAYER FURTHER BONDED TO A TRANSPARENT, PROTECTIVE COVERING MATERIAL.
Claim 3
Dependent Claim
50 words
20-50% of monomers further comprising a. 0 to 50% by total weight of monomer N-alkylacrylamide and/or N-alkylmethacrylamide, wherein the alkyl groups thereof have 1 to 8 carbon atoms, and b. 0 to 50% by total weight of monomers N-vinyl-2-pyrrolidone, the adhesive layer further bonded to a transparent, protective covering material.
Claim 4
Dependent Claim
50 words
20-50% of monomers further comprising a. 0 to 50% by total weight of monomer N-alkylacrylamide and/or N-alkylmethacrylamide, wherein the alkyl groups thereof have 1 to 8 carbon atoms, and b. 0 to 50% by total weight of monomers N-vinyl-2-pyrrolidone, the adhesive layer further bonded to a transparent, protective covering material.
Claim 5
Dependent Claim
28 words
The light control medium of claim 1 wherein the protective covering material is glass having an improved bonding surface of butyral resin against the said polymeric adhesive layer.
Claim 6
Dependent Claim
17 words
The light control medium of claim 1 wherein the protective covering material is a transparent polymeric layer.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |