US1328221A
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Assignee: ZAHM MANUFACTURING Co
•
Filing: 1917-05-25
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Granted: 1920-01-13
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Expires: 1937-05-25
Abstract
No abstract record available.
Inventors
- 👤 Zahm Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:07
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/111; B01D29/31; B01D29/33; B01D29/50; B01D29/52; B01D2201/00; B01D2201/04; B01D2201/043; B01D2201/34
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) | 1923-01-12 | 1923-07-14 | 1924-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1927-01-12 | 1927-07-14 | 1928-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1931-01-12 | 1931-07-14 | 1932-01-13 | $7700.00 | Window Closed / Lapsed |