US2888209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aerator
Assignee: Crane Co
•
Filing: 1955-11-21
•
Granted: 1959-05-26
•
Expires: 1975-11-21
Abstract
No abstract record available.
Inventors
- 👤 Julius A Hjulian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:59
CPC Classifications
E; E03; E03C; E03C1/00; E03C1/02; E03C1/08; E03C1/084
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US322486A
Cited
US1418785A
Cited
US2211892A
Cited
US2316135A
Cited
US2541854A
Cited
US2633343A
Cited
US2664278A
Cited
US2811340A
Cited
US2717772A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-25 | 1962-11-24 | 1963-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-25 | 1966-11-24 | 1967-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-25 | 1970-11-24 | 1971-05-26 | $7700.00 | Window Closed / Lapsed |