US2864929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heater
Assignee: THERMAL Manufacturing Co
•
Filing: 1957-03-14
•
Granted: 1958-12-16
•
Expires: 1977-03-14
Abstract
No abstract record available.
Inventors
- 👤 Russell L Schwing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:29
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/40; H05B3/42; H05B3/46; H05B3/02; H05B3/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2735922A
Cited
US1759184A
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US1810490A
Cited
US1848449A
Cited
US2363130A
Cited
US2528030A
Cited
US2599411A
Cited
US2719212A
Cited
US2798210A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-15 | 1962-06-16 | 1962-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-15 | 1966-06-16 | 1966-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-15 | 1970-06-16 | 1970-12-16 | $7700.00 | Window Closed / Lapsed |