US1803306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic apparatus
Assignee: Commercial Solvents Corp
•
Filing: 1927-01-08
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Granted: 1931-04-28
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Expires: 1947-01-08
Abstract
No abstract record available.
Inventors
- 👤 Leonard A Stengel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:00
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/24; B01J8/26; B01J8/28; B01J8/0005; B01J8/02; B01J8/04; B01J8/0446; B01J8/0449; B01J8/0453; B01J2208/00; B01J2208/00008; B01J2208/00017; B01J2208/00389; B01J2208/00407; B01J2208/00415; B01J2208/00477; B01J2208/00495
Claims Analysis
Total Claims: 0
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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) | 1934-04-27 | 1934-10-27 | 1935-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-04-27 | 1938-10-27 | 1939-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-04-27 | 1942-10-27 | 1943-04-28 | $7700.00 | Window Closed / Lapsed |