US2987603A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiant heating
Assignee: Edwin L Wiegand Co
•
Filing: 1957-11-25
•
Granted: 1961-06-06
•
Expires: 1977-11-25
Abstract
No abstract record available.
Inventors
- 👤 William L Thomson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:38
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/0033; H05B3/009
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE383360C
Cited
US1077676A
Cited
US1762325A
Cited
US2332099A
Cited
US2455034A
Cited
US2492379A
Cited
US2615116A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-05 | 1964-12-05 | 1965-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-05 | 1968-12-05 | 1969-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-05 | 1972-12-05 | 1973-06-06 | $7700.00 | Window Closed / Lapsed |