Patent US1131020A successfully refreshed from Google Patents.
US1131020A
Expired / Lapsed
US
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Water-heater construction.
Assignee: Individual
•
Filing: 1911-10-03
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Granted: 1915-03-09
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Expires: 1931-10-03
Abstract
No abstract record available.
Inventors
- 👤 Frank L O Wadsworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:53
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/02; F23N5/10; F23N5/107
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) | 1918-03-08 | 1918-09-07 | 1919-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1922-03-08 | 1922-09-07 | 1923-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1926-03-08 | 1926-09-07 | 1927-03-09 | $7700.00 | Window Closed / Lapsed |