US2891165A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermocopying machine
Assignee: 3M Co
•
Filing: 1955-03-28
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Granted: 1959-06-16
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Expires: 1975-03-28
Abstract
No abstract record available.
Inventors
- 👤 Carl A Kuhrmeyer
- 👤 John R Favorite
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:11
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/02; G03B27/14; G03B27/30; G03B27/306
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
83 words
THE METHOD OF MAKING COPIES OF IMPROVED CLARITY AND CONTRAST ON HEAT-SENSITIVE COPYING-PAPER FROM GRAPHIC ORIGINALS HAVING IMAGE AREAS HIGHLY ABSORPTIVE OF HEATPRODUCING RADIATION AND BACKGROUND AREAS POORLY ABSORPTIVE OF SAID RADIATION, SAID METHOD COMPRISING ASSEMBLING A COMPOSITE OF SAID COPYING-PAPER AND SAID ORIGINAL IN INTIMATE HEAT-CONDUCTIVE PRESSURE-CONTACT IN POSITION FOR IRRADIATION AND WITH AT LEAST ONE SURFACE OF SAID COMPOSITE IN HEAT-CONDUCTIVE CONTACT WITH MEANS FOR CONDUCTING HEAT FROM SAID COMPOSITE, AND IRRADIATING SAID ORIGINAL AT SUFFICIENTLY HIGH INTENSITY AND FOR SUFFI-
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) | 1962-06-15 | 1962-12-15 | 1963-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-15 | 1966-12-15 | 1967-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-15 | 1970-12-15 | 1971-06-16 | $7700.00 | Window Closed / Lapsed |