US2949381A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Duplicating sheet coated with a colorless waxy transfer material
Assignee: Individual
•
Filing: 1958-04-04
•
Granted: 1960-08-16
•
Expires: 1978-04-04
Abstract
No abstract record available.
Inventors
- 👤 Steinhardt Amos
- 👤 Franklin A Goldwater
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:59
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/132; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31801; Y10T428/31804; Y10T428/31808
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
A DUPLICATING SHEET COMPRISING A LAYER OF SHEET MATRIAL HAVING ON ONE FACE THEREOF A COATING THE PORTION OF SAID COATING NEXT TO SAID MATERIAL BEING A WAXY SUBSTANCE CONTAINING AS ITS ACTIVE COLOR-FORMING INGREDIENT A SUBSTANTIALLY COLORLESS CARBINOL BASE OF A COLORFORMING MATERIAL CAPABLE OF BEING DEVELOPED BY ACID TO A VISIBLE COLOR, MIXED WITH 3,3''-DIAMINODIPYLAMINE AS A PLASTICIZER AND WITH A MINOR QUANTITY OF GLYCERIN AS A SOLYENT, AND WITH TRIS(HYDROXYMETHYL)AMINOMETHANE AS A STABILIZER, SAID STABILIZER BEING IN SUCH EXCESS QUANTITY WITH RESPECT TO THE OTHER INGREDIENTS IN SAID COATING THAT IT TENDS TO SEPARATE INTO TWO PHASES TO FORM A FIRST LAYER NEXT TO SAID SHEET MATERIAL AND AN OVERLYING PROTECTIVE LAYER CONTAINING A GREATER CONCENTRATION OF STABILIZER AND GLYCERINE THAN THAT IN SAID FIRST LAYER.
Claim 2
Dependent Claim
129 words
A DUPLICATING SHEET COMPRISING A LAYER OF SHEET MATRIAL HAVING ON ONE FACE THEREOF A COATING THE PORTION OF SAID COATING NEXT TO SAID MATERIAL BEING A WAXY SUBSTANCE CONTAINING AS ITS ACTIVE COLOR-FORMING INGREDIENT A SUBSTANTIALLY COLORLESS CARBINOL BASE OF A COLORFORMING MATERIAL CAPABLE OF BEING DEVELOPED BY ACID TO A VISIBLE COLOR, MIXED WITH 3,3''-DIAMINODIPYLAMINE AS A PLASTICIZER AND WITH A MINOR QUANTITY OF GLYCERIN AS A SOLYENT, AND WITH TRIS(HYDROXYMETHYL)AMINOMETHANE AS A STABILIZER, SAID STABILIZER BEING IN SUCH EXCESS QUANTITY WITH RESPECT TO THE OTHER INGREDIENTS IN SAID COATING THAT IT TENDS TO SEPARATE INTO TWO PHASES TO FORM A FIRST LAYER NEXT TO SAID SHEET MATERIAL AND AN OVERLYING PROTECTIVE LAYER CONTAINING A GREATER CONCENTRATION OF STABILIZER AND GLYCERINE THAN THAT IN SAID FIRST 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) | 1963-08-16 | 1964-02-15 | 1964-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-16 | 1968-02-15 | 1968-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-16 | 1972-02-15 | 1972-08-16 | $7700.00 | Window Closed / Lapsed |