Patent US3131628A successfully refreshed from Google Patents.
US3131628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diffusion transfer thermographic stencil and process
Assignee: Anken Chemical and Film Corp
•
Filing: 1961-10-10
•
Granted: 1964-05-05
•
Expires: 1981-10-10
Abstract
No abstract record available.
Inventors
- 👤 Wolfson Kurt
- 👤 Lucian C Austin
- 👤 Baturay Omar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:09
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
51 words
A PHOTOTHERMOGRAPHIC STENCIL COMPRISING A POROUS STENCIL BASE IMPREGNATED AND COATED WITH A HEAT-FUSIBLE WAX COMPOSITION, ONE SURFACE OF SAID WAXED STENCIL BASE BEING GLAZED AND HAVING APPLIED THERETO A THIN NUCLEATING LAYER ADAPTED TO SERVE AS THE RECEPTION LAYER IN A SILVER SALT DIFFUSION TRANSFER PROCESS FOR SILVER IMAGE FORMATION.
Claim 2
Dependent Claim
51 words
A PHOTOTHERMOGRAPHIC STENCIL COMPRISING A POROUS STENCIL BASE IMPREGNATED AND COATED WITH A HEAT-FUSIBLE WAX COMPOSITION, ONE SURFACE OF SAID WAXED STENCIL BASE BEING GLAZED AND HAVING APPLIED THERETO A THIN NUCLEATING LAYER ADAPTED TO SERVE AS THE RECEPTION LAYER IN A SILVER SALT DIFFUSION TRANSFER PROCESS FOR SILVER IMAGE FORMATION.
Claim 3
Independent Claim
122 words
A METHOD OF PRODUCING AN INK-TRANSMITTING DUPLICATING STENCIL, COMPRISING THE STEPS OF COATING A STENCIL BASE WITH A HEAT-FUSIBLE, INK-IMPERVIOUS WAX COMPOSITION COATING WHICH IS SOLID AT ROOM TEMPERATURE, GLAXING ONE SURFACE OF SAID COATED STENCIL BASE, COATING SAID GLAZED SURFACE WITH A COLLOID LAYER CARRYING A NUCLEATING AGENT CAPABLE FOR PROMOTING THE REDUCTION OF DISSOLVED SILVER HALIDE COMPLEXES WITHOUT THE ACTION OF EXPOSING RADIATION, FORMING A SILVER IMAGE IN THE NUCLEATED LAYER BY THE DIFFUSION TRANSFER PROCESS, EXPOSING THE STENCIL TO HEAT GENERATING RADIATION TO MELT SAID INK-IMPERVIOUS, HEAT-FUSIBLE COATING AND THE COLLOID CARRIER LAYER COEXTENSIVELY WITH THE SILVER IMAGE, AND FINALLY REMOVING THE MELTED PORTIONS OF SAID HEAT-FUSIBLE, INK-IMPERVIOUS COATING AND SAID COLLOID CARRIER LAYER TO EXPOSE THE IMAGED STENCIL.
Claim 4
Independent Claim
122 words
A METHOD OF PRODUCING AN INK-TRANSMITTING DUPLICATING STENCIL, COMPRISING THE STEPS OF COATING A STENCIL BASE WITH A HEAT-FUSIBLE, INK-IMPERVIOUS WAX COMPOSITION COATING WHICH IS SOLID AT ROOM TEMPERATURE, GLAXING ONE SURFACE OF SAID COATED STENCIL BASE, COATING SAID GLAZED SURFACE WITH A COLLOID LAYER CARRYING A NUCLEATING AGENT CAPABLE FOR PROMOTING THE REDUCTION OF DISSOLVED SILVER HALIDE COMPLEXES WITHOUT THE ACTION OF EXPOSING RADIATION, FORMING A SILVER IMAGE IN THE NUCLEATED LAYER BY THE DIFFUSION TRANSFER PROCESS, EXPOSING THE STENCIL TO HEAT GENERATING RADIATION TO MELT SAID INK-IMPERVIOUS, HEAT-FUSIBLE COATING AND THE COLLOID CARRIER LAYER COEXTENSIVELY WITH THE SILVER IMAGE, AND FINALLY REMOVING THE MELTED PORTIONS OF SAID HEAT-FUSIBLE, INK-IMPERVIOUS COATING AND SAID COLLOID CARRIER LAYER TO EXPOSE THE IMAGED STENCIL.
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) | 1967-05-05 | 1967-11-04 | 1968-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-05 | 1971-11-04 | 1972-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-05 | 1975-11-04 | 1976-05-05 | $7700.00 | Window Closed / Lapsed |