US2987599A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heater assembly
Assignee: Edwin L Wiegand Co
•
Filing: 1958-10-20
•
Granted: 1961-06-06
•
Expires: 1978-10-20
Abstract
No abstract record available.
Inventors
- 👤 William J Voss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:34
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/40; H05B3/54; H05B3/56; H05B3/565
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2029075A
Cited
US2510456A
Cited
US2754406A
Cited
US2740035A
Cited
US2742561A
Cited
US2725457A
Cited
US2748252A
Cited
US2851577A
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 |