Patent US2693352A successfully refreshed from Google Patents.
US2693352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace insulation system
Assignee: Individual
•
Filing: 1950-08-14
•
Granted: 1954-11-02
•
Expires: 1970-08-14
Abstract
No abstract record available.
Inventors
- 👤 Frederick S Bloom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:32
CPC Classifications
F; F27; F27D; F27D3/00; F27D3/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US555693A
Cited
US718214A
Cited
US1506173A
Cited
US1424948A
Cited
US1440218A
Cited
US1670557A
Cited
US1624386A
Cited
US1753220A
Cited
US1969374A
Cited
US2022649A
Cited
US2154619A
Cited
US2173107A
Cited
US2261583A
Cited
US2435362A
Cited
US2436452A
Cited
US2482878A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-01 | 1958-05-03 | 1958-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-01 | 1962-05-03 | 1962-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-01 | 1966-05-03 | 1966-11-02 | $7700.00 | Window Closed / Lapsed |