US3989279A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Latent indicia carrier
Assignee: Individual
•
Filing: 1975-06-04
•
Granted: 1976-11-02
•
Expires: 1995-06-04
Abstract
Abstract A package such as a tea bag has a side surface thereof on which is printed a message. The message is printed with materials that are substantially indistinguishable with the naked eye until a staining agent is activated which selectively stains the package surface but not the indicia thereon to produce a visibly apparent display.
Inventors
- 👤 Leon M. Levy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:25
CPC Classifications
B; B65; B65D; B65D85/00; B65D85/70; B65D85/804; B65D85/808; Y; Y10; Y10S; Y10S283/00; Y10S283/901
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
52 words
A receptacle formed of a non-woven cellulosic material, indicia impressed on one exposed surface of said receptacle which is normally substantially indistinguishable, tea inside the receptacle which upon contact with water stains the receptacle but not the indicia to provide contrast between said indicia and the receptacle to make said indicia visible.
Claim 2
Dependent Claim
52 words
A receptacle formed of a non-woven cellulosic material, indicia impressed on one exposed surface of said receptacle which is normally substantially indistinguishable, tea inside the receptacle which upon contact with water stains the receptacle but not the indicia to provide contrast between said indicia and the receptacle to make said indicia visible.
Claim 3
Dependent Claim
17 words
The combination set forth in claim 1, wherein said indicia is formed from a wax based compound.
Claim 4
Dependent Claim
18 words
The combination set forth in claim 1, wherein said indicia is comprised of a non-toxic water insoluble material.
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) | 1979-11-02 | 1980-05-03 | 1980-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-02 | 1984-05-03 | 1984-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-02 | 1988-05-03 | 1988-11-02 | $7700.00 | Window Closed / Lapsed |