US2432872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pebble heater
Assignee: Phillips Petroleum Co
•
Filing: 1947-03-24
•
Granted: 1947-12-16
•
Expires: 1967-03-24
Abstract
No abstract record available.
Inventors
- 👤 Jr Bernardo J Ferro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:37
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/14; C10G11/16; C01; C01C; C01C3/00; C01C3/02; C01C3/0208; C01C3/0237; F; F28; F28C; F28C3/00; F28C3/10; F28C3/12; F28C3/14; Y; Y10; Y10S; Y10S159/00; Y10S159/29
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2387378A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-12-15 | 1951-06-16 | 1951-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-15 | 1955-06-16 | 1955-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-15 | 1959-06-16 | 1959-12-16 | $7700.00 | Window Closed / Lapsed |