US677639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cover for gas-purifiers.
Assignee: Individual
•
Filing: 1901-02-23
•
Granted: 1901-07-02
•
Expires: 1921-02-23
Abstract
No abstract record available.
Inventors
- 👤 Thomas S Clapham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:53
CPC Classifications
C; C10; C10B; C10B25/00; C10B25/20; B; B65; B65D; B65D2543/00; B65D2543/00009; B65D2543/00444; B65D2543/00481; B65D2543/00537
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) | 1904-07-01 | 1904-12-31 | 1905-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1908-07-01 | 1908-12-31 | 1909-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1912-07-01 | 1912-12-31 | 1913-07-02 | $7700.00 | Window Closed / Lapsed |