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US1277832A
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Assignee: GENERAL FILTRATION COMPANY Inc
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Filing: 1915-12-27
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Granted: 1918-09-03
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Expires: 1935-12-27
Abstract
No abstract record available.
Inventors
- 👤 Walter R Beckley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:07
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/02; B01D35/04; B01D35/043
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) | 1921-09-02 | 1922-03-04 | 1922-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1925-09-02 | 1926-03-04 | 1926-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1929-09-02 | 1930-03-04 | 1930-09-03 | $7700.00 | Window Closed / Lapsed |