US2596837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heater element
Assignee: Individual
•
Filing: 1950-09-29
•
Granted: 1952-05-13
•
Expires: 1970-09-29
Abstract
No abstract record available.
Inventors
- 👤 Calvert Gresham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:03
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/40; H05B3/42; H05B3/44
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) | 1955-05-13 | 1955-11-12 | 1956-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-13 | 1959-11-12 | 1960-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-13 | 1963-11-12 | 1964-05-13 | $7700.00 | Window Closed / Lapsed |