Patent US3420981A successfully refreshed from Google Patents.
US3420981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated heating panel and tables equipped therewith
Assignee: EPM INTERN
•
Filing: 1966-02-14
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Granted: 1969-01-07
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Expires: 1986-02-14
Abstract
No abstract record available.
Inventors
- 👤 Christian Jacques Emi Martinet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:06
CPC Classifications
H; H05; H05B; H05B3/00; E; E04; E04G; E04G9/00; E04G9/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB224648A
Cited
US2469466A
Cited
US2563874A
Cited
US2889439A
Cited
US2834862A
Cited
US2961522A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |