Patent US931963A successfully refreshed from Google Patents.
US931963A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flue-cleaner.
Assignee: ENGINEERS SPECIALTY Co
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Filing: 1908-11-14
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Granted: 1909-08-24
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Expires: 1928-11-14
Abstract
No abstract record available.
Inventors
- 👤 Harry A Ruggles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:37
CPC Classifications
B; B08; B08B; B08B9/00; B08B9/02; B08B9/027; B08B9/04; B08B9/043; B08B9/0436
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) | 1912-08-23 | 1913-02-22 | 1913-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1916-08-23 | 1917-02-22 | 1917-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1920-08-23 | 1921-02-22 | 1921-08-24 | $7700.00 | Window Closed / Lapsed |