US2575202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prefabricated furnace
Assignee: Petro-Chem Process Co Inc
•
Filing: 1948-11-26
•
Granted: 1951-11-13
•
Expires: 1968-11-26
Abstract
No abstract record available.
Inventors
- 👤 John S Wallis
- 👤 John W Throckmorton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:46
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/22; F24H1/40; F24H1/403
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US391255A
Cited
US2224544A
Cited
GB190518838A
Cited
US1049388A
Cited
US998181A
Cited
US1251035A
Cited
AT126219B
Cited
US1989612A
Cited
US2031610A
Cited
US2035167A
Cited
US2372991A
Cited
US2385749A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-12 | 1955-05-14 | 1955-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-12 | 1959-05-14 | 1959-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-12 | 1963-05-14 | 1963-11-13 | $7700.00 | Window Closed / Lapsed |