US1851999A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liner for cracking apparatus
Assignee: Gasoline Products Co Inc
•
Filing: 1927-03-23
•
Granted: 1932-04-05
•
Expires: 1947-03-23
Abstract
No abstract record available.
Inventors
- 👤 John C Black
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:39
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/02; B01J2219/00; B01J2219/02; B01J2219/0204; B01J2219/0236
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1935-04-05 | 1935-10-05 | 1936-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-04-05 | 1939-10-05 | 1940-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-04-05 | 1943-10-05 | 1944-04-05 | $7700.00 | Window Closed / Lapsed |