Patent US2683794A successfully refreshed from Google Patents.
US2683794A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Infrared energy source
Assignee: AT&T Inc
•
Filing: 1951-12-27
•
Granted: 1954-07-13
•
Expires: 1971-12-27
Abstract
No abstract record available.
Inventors
- 👤 Howard B Briggs
- 👤 James R Haynes
- 👤 Shockley William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:08
CPC Classifications
H; H10; H10F; H10F55/00; H10F55/10; H10F55/16; H10F55/165; H10F99/00; F; F25; F25B; F25B23/00; H10H; H10H20/00; H10H20/80
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1957-07-12 | 1958-01-11 | 1958-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-12 | 1962-01-11 | 1962-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-12 | 1966-01-11 | 1966-07-13 | $7700.00 | Window Closed / Lapsed |