Patent US1676134A successfully refreshed from Google Patents.
US1676134A
Expired / Lapsed
US
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Apparatus for treating boilers and boiler-feed water
Assignee: Individual
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Filing: 1925-02-16
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Granted: 1928-07-03
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Expires: 1945-02-16
Abstract
No abstract record available.
Inventors
- 👤 Robert E Coughlan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:30
CPC Classifications
B; B01; B01F; B01F25/00; B01F25/30; B01F25/31; B01F25/314; B01F25/3142; B01F25/31423; B01F25/314231
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) | 1931-07-03 | 1932-01-02 | 1932-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-07-03 | 1936-01-02 | 1936-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-07-03 | 1940-01-02 | 1940-07-03 | $7700.00 | Window Closed / Lapsed |