Patent US1727733A successfully refreshed from Google Patents.
US1727733A
Expired / Lapsed
US
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Separator
Assignee: C A GIBSON
•
Filing: 1921-11-08
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Granted: 1929-09-10
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Expires: 1941-11-08
Abstract
No abstract record available.
Inventors
- 👤 Smith L Stovall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:48
CPC Classifications
B; B01; B01D; B01D19/00; B01D19/0042
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) | 1932-09-09 | 1933-03-11 | 1933-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-09-09 | 1937-03-11 | 1937-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-09-09 | 1941-03-11 | 1941-09-10 | $7700.00 | Window Closed / Lapsed |