Patent US2950213A successfully refreshed from Google Patents.
US2950213A
Expired / Lapsed
US
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Hectograph carbon paper
Assignee: GAF Chemicals Corp
•
Filing: 1956-08-31
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Granted: 1960-08-23
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Expires: 1976-08-31
Abstract
No abstract record available.
Inventors
- 👤 Streck Clemens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:25
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/025; B41M5/0253; Y; Y10; Y10S; Y10S101/00; Y10S101/29
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
A HECTOGRAPH PRODUCT COMPRISING A BASE SHEET HAVING THEREON A HECTOGRAPH OIL-WAX COMPOSITION, IN WHICH THERE IS INTIMATELY DISPERSED A MIXTURE OF AN AMINE STABILIZED DIAZO AMINO COMPONENT, AND A COMPLEX OF A NAPHTHOL AS TYPE COUPLER, OF THE FORMULA
Claim 2
Dependent Claim
40 words
A HECTOGRAPH PRODUCT COMPRISING A BASE SHEET HAVING THEREON A HECTOGRAPH OIL-WAX COMPOSITION, IN WHICH THERE IS INTIMATELY DISPERSED A MIXTURE OF AN AMINE STABILIZED DIAZO AMINO COMPONENT, AND A COMPLEX OF A NAPHTHOL AS TYPE COUPLER, OF THE FORMULA
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-23 | 1964-02-22 | 1964-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-23 | 1968-02-22 | 1968-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-23 | 1972-02-22 | 1972-08-23 | $7700.00 | Window Closed / Lapsed |