Patent US4425448A successfully refreshed from Google Patents.
Patent US1399676A successfully refreshed from Google Patents.
Patent US2279472A successfully refreshed from Google Patents.
Patent US2776907A successfully refreshed from Google Patents.
US2776907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of fixing electrostatic powder image
Assignee: Battelle Development Corp
•
Filing: 1952-07-18
•
Granted: 1957-01-08
•
Expires: 1972-07-18
Abstract
No abstract record available.
Inventors
- 👤 Chester F Carlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:20
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2096; Y; Y10; Y10S; Y10S101/00; Y10S101/37
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
IN A PROCESS WHEREIN AN ELECTROSTATIC IMAGE CORRESPONDING TO A PATTERN OF LIGHT AND SHADOW TO BE REPRODUCED IS MADE VISIBLE BY DEPOSITING POWDER ON A SURFACE IN CONFORMITY WITH SAID ELECTROSTATIC IMAGE AND AFFIXING SAID POWDER IN IMAGE CONFORMATION TO A SUPPORT MATERIAL, THE IMPROVEMENT COMPRISING AFFIXING SAID POWDER IN IMAGE CONFORMATION BY INTRODUCING SAID SUPPORT MATERIAL INTO THE VAPOR OF AT AN ORGANIC LIQUID SOLVENT FOR AN ADHESIVE CONSTITUENT OF AT LEAST ONE OF THE MATERIALS FROM WHICH SAID POWDER IMAGE AND SAID SUPPORT MATERIAL FROM WHICH SAID POWDER IMAGE AND SAID SUPPORT MATERIAL ARE FORMED, SAID VAPOR AND SAID SUPPORT MATERIAL BEING AT AMBIENT TEMPERATURE AND SAID VAPOR BEING AT A PARTIAL PRESSURE EXCEEDING THE VAPOR PRESSURE OF SOLVENT FROM A TACKY SOLUTION OF SAID ADHESIVE CONSTITUENT, AND THEN REMOVING SAID SUPPORT MATERIAL FROM SAID VAPOR AFTER SAID ADHESIVE HAS BECOME TACKY, AND REMOVING SAID SOLVENT FROM SAID ADHESIVE TO PERMANENTLY BOND SAID IMAGE TO SAID SUPPORT MATERIAL.
Claim 2
Dependent Claim
161 words
IN A PROCESS WHEREIN AN ELECTROSTATIC IMAGE CORRESPONDING TO A PATTERN OF LIGHT AND SHADOW TO BE REPRODUCED IS MADE VISIBLE BY DEPOSITING POWDER ON A SURFACE IN CONFORMITY WITH SAID ELECTROSTATIC IMAGE AND AFFIXING SAID POWDER IN IMAGE CONFORMATION TO A SUPPORT MATERIAL, THE IMPROVEMENT COMPRISING AFFIXING SAID POWDER IN IMAGE CONFORMATION BY INTRODUCING SAID SUPPORT MATERIAL INTO THE VAPOR OF AT AN ORGANIC LIQUID SOLVENT FOR AN ADHESIVE CONSTITUENT OF AT LEAST ONE OF THE MATERIALS FROM WHICH SAID POWDER IMAGE AND SAID SUPPORT MATERIAL FROM WHICH SAID POWDER IMAGE AND SAID SUPPORT MATERIAL ARE FORMED, SAID VAPOR AND SAID SUPPORT MATERIAL BEING AT AMBIENT TEMPERATURE AND SAID VAPOR BEING AT A PARTIAL PRESSURE EXCEEDING THE VAPOR PRESSURE OF SOLVENT FROM A TACKY SOLUTION OF SAID ADHESIVE CONSTITUENT, AND THEN REMOVING SAID SUPPORT MATERIAL FROM SAID VAPOR AFTER SAID ADHESIVE HAS BECOME TACKY, AND REMOVING SAID SOLVENT FROM SAID ADHESIVE TO PERMANENTLY BOND SAID IMAGE TO SAID SUPPORT MATERIAL.
References Cited (Backward Citations)
GB190607402A
Cited
US921229A
Cited
US1141224A
Cited
US1339529A
Cited
US1569048A
Cited
US1811107A
Cited
US2034008A
Cited
US2097885A
Cited
US2138578A
Cited
US2250925A
Cited
US2221776A
Cited
US2297691A
Cited
US2361350A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-08 | 1960-07-09 | 1961-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-08 | 1964-07-09 | 1965-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-08 | 1968-07-09 | 1969-01-08 | $7700.00 | Window Closed / Lapsed |