US2500676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating apparatus
Assignee: Raytheon Co
•
Filing: 1947-01-14
•
Granted: 1950-03-14
•
Expires: 1967-01-14
Abstract
No abstract record available.
Inventors
- 👤 William M Hall
- 👤 Fritz A Gross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:06
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/64; H05B6/76; Y; Y10; Y10S; Y10S264/00; Y10S264/46; Y10S99/00; Y10S99/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2370161A
Cited
US2226479A
Cited
US2364526A
Cited
US2439388A
Cited
US2407318A
Cited
US2408295A
Cited
US2415962A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-13 | 1953-09-12 | 1954-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-13 | 1957-09-12 | 1958-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-13 | 1961-09-12 | 1962-03-14 | $7700.00 | Window Closed / Lapsed |