US1778342A
Expired / Lapsed
US
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Assignee: Individual
•
Filing: 1921-01-03
•
Granted: 1930-10-14
•
Expires: 1941-01-03
Abstract
No abstract record available.
Inventors
- 👤 Robert M Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:38
CPC Classifications
B; B30; B30B; B30B9/00; B30B9/02; B30B9/24; B01; B01D; B01D33/00; B01D33/04; B01D33/042; B01D33/056; B01D33/44; B01D33/46; B01D33/461; B01D33/463; B01D33/48; B01D33/50; B01D33/58; B01D33/62; B01D33/66; B01D33/666; B01D35/00; B01D35/16; B01D35/18; B01D37/00
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) | 1933-10-13 | 1934-04-14 | 1934-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-10-13 | 1938-04-14 | 1938-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-10-13 | 1942-04-14 | 1942-10-14 | $7700.00 | Window Closed / Lapsed |