US2915613A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating surface
Assignee: Individual
•
Filing: 1955-11-29
•
Granted: 1959-12-01
•
Expires: 1975-11-29
Abstract
No abstract record available.
Inventors
- 👤 William H Norton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:13
CPC Classifications
B; B01; B01L; B01L7/00; A; A47; A47J; A47J36/00; A47J36/24; A47J36/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US540073A
Cited
US1563731A
Cited
GB650676A
Cited
US2611069A
Cited
US2628927A
Cited
US2690401A
Cited
US2617741A
Cited
US2690403A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-30 | 1963-06-01 | 1963-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-30 | 1967-06-01 | 1967-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-30 | 1971-06-01 | 1971-12-01 | $7700.00 | Window Closed / Lapsed |