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Patent US3447944A successfully refreshed from Google Patents.
US3447944A
Expired / Lapsed
US
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Thermographic copying system
Assignee: Noveon Hilton Davis Inc
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Filing: 1965-12-06
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Granted: 1969-06-03
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Expires: 1985-12-06
Abstract
No abstract record available.
Inventors
- 👤 Raymond E Werner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:45
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/30; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S430/00; Y10S430/165
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2755203A
Cited
US2783228A
Cited
US2935938A
Cited
US2915415A
Cited
US3076721A
Cited
US3129109A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-02 | 1972-12-02 | 1973-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-02 | 1976-12-02 | 1977-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-02 | 1980-12-02 | 1981-06-03 | $7700.00 | Window Closed / Lapsed |