US869720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary screen mechanism.
Assignee: OLIVER M WEAND
•
Filing: 1907-07-29
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Granted: 1907-10-29
•
Expires: 1927-07-29
Abstract
No abstract record available.
Inventors
- 👤 William C Matthias
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:29
CPC Classifications
B; B01; B01D; B01D33/00; B01D33/44; B01D33/46; B01D33/463; B01D33/06; B01D33/11
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) | 1910-10-28 | 1911-04-29 | 1911-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1914-10-28 | 1915-04-29 | 1915-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1918-10-28 | 1919-04-29 | 1919-10-29 | $7700.00 | Window Closed / Lapsed |