US3424581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic emulsion of silver halide and derivatized gelatin capable of conducting electrical current
Assignee: Polaroid Corp
•
Filing: 1966-01-25
•
Granted: 1969-01-28
•
Expires: 1986-01-25
Abstract
No abstract record available.
Inventors
- 👤 George H Nawn
- 👤 William J Timson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:11
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/10; H05K3/105; H05K3/106; G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/047
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A METHOD OF CONDUCTING ELECTRICAL ENERGY WHICH COMPRISES IMPRESSING AN ELECTRICAL CURRENT ON A CIRCUIT COMPRISING AN ELECTRICALLY CONDUCTING SILVER IMAGE PREPARED BY EXPOSING A SILVER HALIDE ELEMENT WHICH COMPRISES A DISPERSION OF SILVER HALIDE CRYSTALS DISTRIBUTED IN A COLLOID BINDER COMPRISING A DERIVATIZED GELATIN POSSESSING LOCALIZED NET NEGATIVE ELECTROSTATIC CHARGE IN A QUANTUM SUFFICIENT TO PREVENT SUBSTANTIALLY COMPLETE ADSORPTION OF SAID GELATIN TO THE ACTIVE FACE OF SAID CRYSTALS AND DEVELOPING SAID EXPOSED SILVER HALIDE EMULSION WITH SILVER HLIDE DEVELOPING AGENT FOR A TIME SUFFICIENT TO PROVIDE DEVELOPMENT OF THE LATENT IMAGE TO A SILBER IMAGE AND FORMATION OF SILVER FILAMENTS INTERCONNECTING THE SILVER GRAINS CONSTITUTING SAID DEVELOPED IMAGE.
Claim 2
Independent Claim
110 words
A METHOD OF CONDUCTING ELECTRICAL ENERGY WHICH COMPRISES IMPRESSING AN ELECTRICAL CURRENT ON A CIRCUIT COMPRISING AN ELECTRICALLY CONDUCTING SILVER IMAGE PREPARED BY EXPOSING A SILVER HALIDE ELEMENT WHICH COMPRISES A DISPERSION OF SILVER HALIDE CRYSTALS DISTRIBUTED IN A COLLOID BINDER COMPRISING A DERIVATIZED GELATIN POSSESSING LOCALIZED NET NEGATIVE ELECTROSTATIC CHARGE IN A QUANTUM SUFFICIENT TO PREVENT SUBSTANTIALLY COMPLETE ADSORPTION OF SAID GELATIN TO THE ACTIVE FACE OF SAID CRYSTALS AND DEVELOPING SAID EXPOSED SILVER HALIDE EMULSION WITH SILVER HLIDE DEVELOPING AGENT FOR A TIME SUFFICIENT TO PROVIDE DEVELOPMENT OF THE LATENT IMAGE TO A SILBER IMAGE AND FORMATION OF SILVER FILAMENTS INTERCONNECTING THE SILVER GRAINS CONSTITUTING SAID DEVELOPED IMAGE.
References Cited (Backward Citations)
GB776343A
Cited
US2868124A
Cited
US3061436A
Cited
US3138461A
Cited
US3186846A
Cited
US3132945A
Cited
US3223528A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-28 | 1972-07-29 | 1973-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-28 | 1976-07-29 | 1977-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-28 | 1980-07-29 | 1981-01-28 | $7700.00 | Window Closed / Lapsed |