US1685388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boiler construction
Assignee: TUBAL BOILER Co
•
Filing: 1923-12-15
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Granted: 1928-09-25
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Expires: 1943-12-15
Abstract
No abstract record available.
Inventors
- 👤 Raymond E White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:24
CPC Classifications
F; F28; F28F; F28F3/00; F28F3/12; F28F3/14; F23; F23B; F23B2700/00; F23B2700/01; Y; Y10; Y10S; Y10S122/00; Y10S122/16; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49387
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) | 1931-09-25 | 1932-03-26 | 1932-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-09-25 | 1936-03-26 | 1936-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-09-25 | 1940-03-26 | 1940-09-25 | $7700.00 | Window Closed / Lapsed |