US1634783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Individual
•
Filing: 1921-11-12
•
Granted: 1927-07-05
•
Expires: 1941-11-12
Abstract
No abstract record available.
Inventors
- 👤 Hungerford Churchhill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:51
CPC Classifications
B; B01; B01D; B01D24/00; B01D24/02; B01D24/20; B01D24/24; B01D24/46; B01D24/4631; B01D24/48; B01D24/4869; B01D2201/00; B01D2201/20; B01D2201/204; B01D2201/206
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) | 1930-07-04 | 1931-01-03 | 1931-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1934-07-04 | 1935-01-03 | 1935-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1938-07-04 | 1939-01-03 | 1939-07-05 | $7700.00 | Window Closed / Lapsed |