US2749253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a copy sheet and resultant article
Assignee: AB Dick Co
•
Filing: 1952-05-20
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Granted: 1956-06-05
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Expires: 1972-05-20
Abstract
No abstract record available.
Inventors
- 👤 Clarence J Shoemaker
- 👤 Edward J Igler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:10
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/30; B41M5/337; B41M5/3372; Y; Y10; Y10S; Y10S428/00; Y10S428/913
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
A COPY SHEET OF THE TYPE DESCRIBED COMPRISING A PAPER BASE SHEET CONTAINING A SENSITIZING COMPOSITION WHICH PRODUCES A VISIBLE COLOR CHANGE AT ELEVATED TEMPERATURE AND A POLYSILOXANE DISTRIBUTED THROUGHOUT THE SHEET.
Claim 2
Dependent Claim
32 words
A COPY SHEET OF THE TYPE DESCRIBED COMPRISING A PAPER BASE SHEET CONTAINING A SENSITIZING COMPOSITION WHICH PRODUCES A VISIBLE COLOR CHANGE AT ELEVATED TEMPERATURE AND A POLYSILOXANE DISTRIBUTED THROUGHOUT THE SHEET.
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) | 1959-06-05 | 1959-12-05 | 1960-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-05 | 1963-12-05 | 1964-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-05 | 1967-12-05 | 1968-06-05 | $7700.00 | Window Closed / Lapsed |