US643074A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for feeding anti-incrustation compounds to boilers.
Assignee: Individual
•
Filing: 1897-12-11
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Granted: 1900-02-06
•
Expires: 1917-12-11
Abstract
No abstract record available.
Inventors
- 👤 Thomas J Sweeney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:19
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/68; C02F1/685; C02F1/686; F; F02; F02M; F02M25/00; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7313; Y10T137/7323; Y10T137/7326; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/8593; Y10T137/85978; Y10T137/85986; Y10T137/87571; Y10T137/87587; Y10T137/87603
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) | 1903-02-06 | 1903-08-08 | 1904-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1907-02-06 | 1907-08-08 | 1908-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1911-02-06 | 1911-08-08 | 1912-02-07 | $7700.00 | Window Closed / Lapsed |