US6481753B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Form for concealing variable printed information
Assignee: Documotion Research Inc
•
Filing: 2001-02-09
•
Granted: 2002-11-19
•
Expires: 2021-02-09
Abstract
Abstract Variable confidential information ( 12 ) is printed over scrambling pattern ( 14 ) which is formed of thermochromatic ink. Information ( 12 ) cannot be read due to the presence of the underlying scrambling pattern. The information becomes readable when heat is applied to the thermochromatic ink and the optical properties of the thermochromatic ink are altered. Preferably, the alteration of the optical properties of the thermochromatic ink is irreversible
Inventors
- 👤 Joel Bryan Van Boom
- 👤 Chuck Casagrande
- 👤 Bernard Willem “Wim” Scheggetman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:22
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/04; G03G21/043; B; B41; B41J; B41J29/00; B41J29/38; B41J29/393; B41J3/00; B41J3/44; B41J3/50; B41J3/51; B41M; B41M3/00; B41M3/14; B42; B42D; B42D25/00; B42D25/20; B42D25/29; G09; G09F; G09F3/00; G09F3/02; G09F3/0291; G09F3/0294; B41M5/00; B41M5/26; B41M5/28; Y; Y10; Y10S; Y10S283/00; Y10S283/901
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
78 words
A form for concealing variable printed information and including a thermochromatic scrambling pattern, wherein variable information printed over the thermochromatic scrambling pattern cannot be discriminated from the thermochromatic scrambling pattern until heat is applied and the optical properties of the thermochromatic scrambling pattern are altered and wherein the thermochromatic scrambling pattern is on the underside of a sheet of transparent material and wherein the variable information is printed on the upper side of the sheet of transparent material.
Claim 2
Dependent Claim
78 words
A form for concealing variable printed information and including a thermochromatic scrambling pattern, wherein variable information printed over the thermochromatic scrambling pattern cannot be discriminated from the thermochromatic scrambling pattern until heat is applied and the optical properties of the thermochromatic scrambling pattern are altered and wherein the thermochromatic scrambling pattern is on the underside of a sheet of transparent material and wherein the variable information is printed on the upper side of the sheet of transparent material.
Claim 3
Dependent Claim
85 words
A form for concealing variable printed information and including a thermochromatic scrambling pattern, wherein variable information printed over the thermochromatic scrambling pattern cannot be discriminated from the thermochromatic scrambling pattern until heat is applied and the optical properties of the thermochromatic scrambling pattern are altered and wherein the thermochromatic pattern is on the upper side of a substrate and wherein the variable information is printed on the upper side of a sheet of transparent material which is adhered to the upper side of the substrate.
Claim 4
Dependent Claim
85 words
A form for concealing variable printed information and including a thermochromatic scrambling pattern, wherein variable information printed over the thermochromatic scrambling pattern cannot be discriminated from the thermochromatic scrambling pattern until heat is applied and the optical properties of the thermochromatic scrambling pattern are altered and wherein the thermochromatic pattern is on the upper side of a substrate and wherein the variable information is printed on the upper side of a sheet of transparent material which is adhered to the upper side of the substrate.
Claim 5
Dependent Claim
22 words
A form as claimed in claim 1 , wherein the alteration of the optical properties of the thermochromatic scrambling pattern is irreversible.
Claim 6
Dependent Claim
22 words
A form as claimed in claim 2 , wherein the alteration of the optical properties of the thermochromatic scrambling pattern is irreversible.
References Cited (Backward Citations)
US1996288A
Cited
GB851749A
Cited
US3001886A
Cited
US2952080A
Cited
GB894081A
Cited
FR1259277A
Cited
US3279826A
Cited
US3315386A
Cited
US3520757A
Cited
GB1235941A
Cited
US3675948A
Cited
US3891242A
Cited
US4109047A
Cited
GB1590274A
Cited
US4174857A
Cited
US4299637A
Cited
US4379573A
Cited
US4551373A
Cited
US4790565A
Cited
US4668597A
Cited
US4778153A
Cited
EP0271673A1
Cited
US4889365A
Cited
US5310222A
Cited
US5013088A
Cited
US5324380A
Cited
US5253899A
Cited
US5076613A
Cited
WO1991018376A1
Cited
US5288977A
Cited
US5238272A
Cited
US5346258A
Cited
US5286061A
Cited
US5411295A
Cited
US5393099A
Cited
US5431452A
Cited
US5595403A
Cited
US5551729A
Cited
US5873604A
Cited
US5618112A
Cited
US5863075A
Cited
US5839763A
Cited
US6313067B1
Cited
US5893587A
Cited
US6030000A
Cited
US6220633B1
Cited
US6231082B1
Cited
US6114077A
Cited
US6022051A
Cited
US6113150A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2005-11-18 | 2006-05-20 | 2006-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-11-18 | 2010-05-20 | 2010-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-11-18 | 2014-05-20 | 2014-11-19 | $7700.00 | Window Closed / Lapsed |