US670893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steam heating apparatus.
Assignee: Individual
•
Filing: 1900-05-14
•
Granted: 1901-03-26
•
Expires: 1920-05-14
Abstract
No abstract record available.
Inventors
- 👤 James A Donnelly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:45
CPC Classifications
F; F16; F16T; F16T1/00; F16T1/20; F16T1/22; F16T1/24; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2564; Y10T137/2572; Y10T137/2931; Y10T137/3003; Y10T137/3021; Y10T137/304; Y10T137/3052; Y10T137/3068; Y10T137/3077; Y10T137/7287; Y10T137/7358; Y10T137/7368; Y10T137/7371; Y10T137/7378; Y10T137/7423; Y10T137/7426; Y10T137/7436
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) | 1904-03-25 | 1904-09-24 | 1905-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1908-03-25 | 1908-09-24 | 1909-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1912-03-25 | 1912-09-24 | 1913-03-26 | $7700.00 | Window Closed / Lapsed |