US2844733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reflex thermoprinting
Assignee: 3M Co
•
Filing: 1956-04-02
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Granted: 1958-07-22
•
Expires: 1976-04-02
Abstract
No abstract record available.
Inventors
- 👤 Carl S Miller
- 👤 Carl A Kuhrmeyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:47
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/02; G03B27/14; G03B27/30; G03B27/306
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A METHOD FOR THE PRODUCTION OF PERMANENT FACSIMILE COPIES OF A GRAPHIC ORIGINAL HAVING A VISIBLE GRAPHIC PATTERN ON A VISIBLY CONTRASTING BACKGROUND, SAID PATTERN AND BACKGROUND BEING DIFFERENTIALLY REFLECTIVE OF INTENSE RADIANT ENERGY, SAID METHOD COMPRISING PLACING OVER THE GRAPHIC ORIGINAL A HEAT-SENSITIVE RAPIDLY-REACTIVE COPYPAPER CAPABLE OF ABSORBING A SUBSTANTIAL PROPORTION OF SAID ENERGY, AND IRRADIATING THE ORIGINAL THROUGH THE COPY PAPER WITH INTENSE RADIANT ENERGY AT SUFFICIENTLY HIGH INTENSITY AND FOR SUFFICIENTLY SHORT TIME TO PROVIDE A VISIBLE CHANGE IN THE AREAS OF THE COPY-PAPER CORRESPONDING TO THE MORE REFLECTIVE AREAS OF THE ORIGINAL WHILE AVOIDING VISIBLE CHANGE IN AREAS CORRESPONDING TO THE LESS REFLECTIVE AREAS.
Claim 2
Independent Claim
108 words
A METHOD FOR THE PRODUCTION OF PERMANENT FACSIMILE COPIES OF A GRAPHIC ORIGINAL HAVING A VISIBLE GRAPHIC PATTERN ON A VISIBLY CONTRASTING BACKGROUND, SAID PATTERN AND BACKGROUND BEING DIFFERENTIALLY REFLECTIVE OF INTENSE RADIANT ENERGY, SAID METHOD COMPRISING PLACING OVER THE GRAPHIC ORIGINAL A HEAT-SENSITIVE RAPIDLY-REACTIVE COPYPAPER CAPABLE OF ABSORBING A SUBSTANTIAL PROPORTION OF SAID ENERGY, AND IRRADIATING THE ORIGINAL THROUGH THE COPY PAPER WITH INTENSE RADIANT ENERGY AT SUFFICIENTLY HIGH INTENSITY AND FOR SUFFICIENTLY SHORT TIME TO PROVIDE A VISIBLE CHANGE IN THE AREAS OF THE COPY-PAPER CORRESPONDING TO THE MORE REFLECTIVE AREAS OF THE ORIGINAL WHILE AVOIDING VISIBLE CHANGE IN AREAS CORRESPONDING TO THE LESS REFLECTIVE AREAS.
References Cited (Backward Citations)
US2740896A
Cited
US2740895A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-21 | 1962-01-20 | 1962-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-21 | 1966-01-20 | 1966-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-21 | 1970-01-20 | 1970-07-22 | $7700.00 | Window Closed / Lapsed |