Patent US1142809A successfully refreshed from Google Patents.
US1142809A
Expired / Lapsed
US
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Cooling-tower.
Assignee: HENRY R WORTHINGTON
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Filing: 1913-03-07
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Granted: 1915-06-15
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Expires: 1933-03-07
Abstract
No abstract record available.
Inventors
- 👤 John F Grace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:08
CPC Classifications
F; F28; F28F; F28F25/00; F28F25/02; F28F25/08; F28F25/082; Y; Y10; Y10S; Y10S261/00; Y10S261/11
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) | 1918-06-14 | 1918-12-14 | 1919-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1922-06-14 | 1922-12-14 | 1923-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1926-06-14 | 1926-12-14 | 1927-06-15 | $7700.00 | Window Closed / Lapsed |