Patent US2987187A successfully refreshed from Google Patents.
US2987187A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water purifier
Assignee: Individual
•
Filing: 1958-02-27
•
Granted: 1961-06-06
•
Expires: 1978-02-27
Abstract
No abstract record available.
Inventors
- 👤 Daniel B Comroe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:45
CPC Classifications
B; B01; B01J; B01J47/00; B01J47/02; B01J47/022; B01J47/024; C; C02; C02F; C02F9/00; C02F9/20; C02F1/00; C02F1/42; C02F2201/00; C02F2201/002; C02F2201/006
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1195427A
Cited
US2061714A
Cited
US2061715A
Cited
US2170975A
Cited
US2304453A
Cited
US2370190A
Cited
US2371444A
Cited
US2628191A
Cited
US2647871A
Cited
US2761832A
Cited
US2781312A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-05 | 1964-12-05 | 1965-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-05 | 1968-12-05 | 1969-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-05 | 1972-12-05 | 1973-06-06 | $7700.00 | Window Closed / Lapsed |