US3246600A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of copying
Assignee: 3M Co
•
Filing: 1963-10-28
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Granted: 1966-04-19
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Expires: 1983-10-28
Abstract
No abstract record available.
Inventors
- 👤 Thomas G Wartman
- 👤 Gerhard W R Puerckhauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:39
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/382; B41M5/38207; B41M5/38214; B41C; B41C1/00; B41C1/14; B41C1/148; Y; Y10; Y10S; Y10S101/00; Y10S101/29
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A METHOD OF MAKING COPIES OF A GRAPHIC ORIGINAL COMPRISING: APPLYING A HEAT-PATTERN CORRESPONDING TO THE IMAGE-FORMING PATTERN OF SAID ORIGINAL TO THE THERMOPLASTIC FILM SURFACE OF A HEAT-SENSITIVE SHEET MATERIAL COMPRISING IN ORDER A THIN TENSILIZED CONTINUOUS THERMOPLASTIC FILM, A THIN STRATUM OF POROUS FIBROUS MATERIAL CONTAINING A TRANSFERABLE IMAGE-FORMING MATERIAL, AND A HEAT-RESISTANT CONTINUOUS FILM, TO RENDER SAID THERMOPLASTIC FILM POROUS AT THE HEAT-PATTERN AREAS; PLACING SAID SHEET MATERIAL WITH THE PERFORATE FILM IN PRESSURE-CONTACT
Claim 2
Independent Claim
77 words
A METHOD OF MAKING COPIES OF A GRAPHIC ORIGINAL COMPRISING: APPLYING A HEAT-PATTERN CORRESPONDING TO THE IMAGE-FORMING PATTERN OF SAID ORIGINAL TO THE THERMOPLASTIC FILM SURFACE OF A HEAT-SENSITIVE SHEET MATERIAL COMPRISING IN ORDER A THIN TENSILIZED CONTINUOUS THERMOPLASTIC FILM, A THIN STRATUM OF POROUS FIBROUS MATERIAL CONTAINING A TRANSFERABLE IMAGE-FORMING MATERIAL, AND A HEAT-RESISTANT CONTINUOUS FILM, TO RENDER SAID THERMOPLASTIC FILM POROUS AT THE HEAT-PATTERN AREAS; PLACING SAID SHEET MATERIAL WITH THE PERFORATE FILM IN PRESSURE-CONTACT
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) | 1969-04-18 | 1969-10-18 | 1970-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-18 | 1973-10-18 | 1974-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-18 | 1977-10-18 | 1978-04-19 | $7700.00 | Window Closed / Lapsed |