Patent US1020782A successfully refreshed from Google Patents.
US1020782A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas-filter.
Assignee: Individual
•
Filing: 1911-04-15
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Granted: 1912-03-19
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Expires: 1931-04-15
Abstract
No abstract record available.
Inventors
- 👤 William Johnston Tinker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:31
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/0002; B01D46/0004; Y; Y10; Y10S; Y10S55/00; Y10S55/32
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) | 1915-03-19 | 1915-09-18 | 1916-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1919-03-19 | 1919-09-18 | 1920-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1923-03-19 | 1923-09-18 | 1924-03-19 | $7700.00 | Window Closed / Lapsed |