Patent US820216A successfully refreshed from Google Patents.
US820216A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tube-compressor.
Assignee: Individual
•
Filing: 1905-03-31
•
Granted: 1906-05-08
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Expires: 1925-03-31
Abstract
No abstract record available.
Inventors
- 👤 Everett K Leffingwell
- 👤 Harry B Eltonhead
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:21
CPC Classifications
A; A61; A61M; A61M39/00; A61M39/22; A61M39/28; A61M39/284; Y; Y10; Y10T; Y10T24/00; Y10T24/44; Y10T24/44291; Y10T24/44368
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) | 1909-05-07 | 1909-11-06 | 1910-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1913-05-07 | 1913-11-06 | 1914-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1917-05-07 | 1917-11-06 | 1918-05-08 | $7700.00 | Window Closed / Lapsed |