Patent US2859947A successfully refreshed from Google Patents.
US2859947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiators
Assignee: Individual
•
Filing: 1956-09-14
•
Granted: 1958-11-11
•
Expires: 1976-09-14
Abstract
No abstract record available.
Inventors
- 👤 Persson Eric Sigfrid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:08
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/007; F28F9/013; F28F9/0132; F28D; F28D1/00; F28D1/02; F28D1/04; F28D1/047; F28D1/0477
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1790535A
Cited
US1951541A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-10 | 1962-05-12 | 1962-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-10 | 1966-05-12 | 1966-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-10 | 1970-05-12 | 1970-11-11 | $7700.00 | Window Closed / Lapsed |