Patent US2683111A successfully refreshed from Google Patents.
US2683111A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical recording
Assignee: RCA Corp
•
Filing: 1949-06-29
•
Granted: 1954-07-06
•
Expires: 1969-06-29
Abstract
No abstract record available.
Inventors
- 👤 Harold G Greig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:29
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/23
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
THE METHOD OF PRODUCING MARKS WHICH COMBINE TO REPRESENT AN IMAGE UPON THE SURFACE OF A RECORD RECEIVING SHEET, COMPRISING MOISTENING SAID SHEET WITH A NEUTRAL SOLUTION OF AN ELECTROLYTE WHICH IS A SALT OF A STRONG ACID AND A STRONG BASE, PASSING A UNIDIRECTIONAL ELECTRIC SIGNALING CURRENT THROUGH SAID MOISTENED SHEET IN SUCCESSIVE ELECMENTAL AREAS, SAID CURRENT BEING OF A MAGNITUDE AND BEING APPLIED IN A TIME SUFFICIENT TO PRODUCE AN ACIDIFIED CONDITION ON ONE SIDE OF THE SHEET IN EACH ELEMENTAL AREA RECEIVING SAID CURRENT, AND IMMEDIATELY APPLYING HEAT TO ONE SIDE OF THE SHEET IN AN AMOUNT SUFFICIENT ONLY TO CAUSE DISCOLORATION BY CHARRING OF THE AREA SUBJECTED TO ACIDULATION BY THE CURRENT TO PRESENT AN APPEARANCE WHICH CONTRASTS WITH THE UNCHANGED BACKGROUND OF THE SHEET.
Claim 2
Independent Claim
129 words
THE METHOD OF PRODUCING MARKS WHICH COMBINE TO REPRESENT AN IMAGE UPON THE SURFACE OF A RECORD RECEIVING SHEET, COMPRISING MOISTENING SAID SHEET WITH A NEUTRAL SOLUTION OF AN ELECTROLYTE WHICH IS A SALT OF A STRONG ACID AND A STRONG BASE, PASSING A UNIDIRECTIONAL ELECTRIC SIGNALING CURRENT THROUGH SAID MOISTENED SHEET IN SUCCESSIVE ELECMENTAL AREAS, SAID CURRENT BEING OF A MAGNITUDE AND BEING APPLIED IN A TIME SUFFICIENT TO PRODUCE AN ACIDIFIED CONDITION ON ONE SIDE OF THE SHEET IN EACH ELEMENTAL AREA RECEIVING SAID CURRENT, AND IMMEDIATELY APPLYING HEAT TO ONE SIDE OF THE SHEET IN AN AMOUNT SUFFICIENT ONLY TO CAUSE DISCOLORATION BY CHARRING OF THE AREA SUBJECTED TO ACIDULATION BY THE CURRENT TO PRESENT AN APPEARANCE WHICH CONTRASTS WITH THE UNCHANGED BACKGROUND OF THE SHEET.
References Cited (Backward Citations)
GB189825292A
Cited
US859948A
Cited
US1770493A
Cited
FR676622A
Cited
US2040142A
Cited
US2227109A
Cited
US2339267A
Cited
US2391765A
Cited
US2389021A
Cited
US2453484A
Cited
US2485678A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-07-05 | 1958-01-04 | 1958-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-05 | 1962-01-04 | 1962-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-05 | 1966-01-04 | 1966-07-06 | $7700.00 | Window Closed / Lapsed |