US1235835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flue-expander.
Assignee: NILSON BROS
•
Filing: 1916-03-06
•
Granted: 1917-08-07
•
Expires: 1936-03-06
Abstract
No abstract record available.
Inventors
- 👤 Andrew Nilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:16
CPC Classifications
B; B21; B21D; B21D53/00; B21D53/02; B21D53/08; B21D53/085; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53113; Y10T29/53122
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) | 1920-08-06 | 1921-02-05 | 1921-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1924-08-06 | 1925-02-05 | 1925-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1928-08-06 | 1929-02-05 | 1929-08-07 | $7700.00 | Window Closed / Lapsed |