US3219819A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of thermographic reproduction with the use of an infrared radiation filter
Assignee: Individual
•
Filing: 1964-02-17
•
Granted: 1965-11-23
•
Expires: 1984-02-17
Abstract
No abstract record available.
Inventors
- 👤 Ernest B Brewster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:14
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/40; B41M5/46; B41M5/465
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA504450A
Cited
GB317936A
Cited
US2859351A
Cited
US2768906A
Cited
US2880110A
Cited
US2875098A
Cited
US2916622A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |