US2736298A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Welded steel boiler
Assignee: Individual
•
Filing: 1952-07-23
•
Granted: 1956-02-28
•
Expires: 1972-07-23
Abstract
No abstract record available.
Inventors
- 👤 Smith Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:11
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/22; F24H1/40; F22; F22B; F22B21/00; F22B21/02; F22B21/04; F23; F23M; F23M5/00; F24H1/34; F24H1/44; F23M2700/00; F23M2700/005; Y; Y10; Y10S; Y10S122/00; Y10S122/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US323957A
Cited
US696714A
Cited
US2117511A
Cited
US2195274A
Cited
US2305847A
Cited
US2327750A
Cited
US2362107A
Cited
GB575083A
Cited
US2607325A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-02-27 | 1959-08-29 | 1960-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-27 | 1963-08-29 | 1964-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-27 | 1967-08-29 | 1968-02-28 | $7700.00 | Window Closed / Lapsed |