US2493498A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating method and apparatus
Assignee: Shell Development Co
•
Filing: 1946-10-25
•
Granted: 1950-01-03
•
Expires: 1966-10-25
Abstract
No abstract record available.
Inventors
- 👤 Norman E Peery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:26
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/0006; B01J19/0013; B01J8/00; B01J8/18; B01J8/1836; C; C10; C10G; C10G9/00; C10G9/14; C10G9/18; C10G9/20; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00157
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1253342A
Cited
US1747676A
Cited
US1857364A
Cited
US2264438A
Cited
US2417393A
Cited
US2412136A
Cited
US2409707A
Cited
GB587774A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-02 | 1953-07-04 | 1954-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-02 | 1957-07-04 | 1958-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-02 | 1961-07-04 | 1962-01-03 | $7700.00 | Window Closed / Lapsed |