US3458038A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screening apparatus
Assignee: Canadian Ingersoll Rand Co Ltd
•
Filing: 1966-06-02
•
Granted: 1969-07-29
•
Expires: 1986-06-02
Abstract
No abstract record available.
Inventors
- 👤 Douglas L G Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:11
CPC Classifications
B; B03; B03B; B03B5/00; B03B5/48; B03B5/56; D; D21; D21D; D21D5/00; D21D5/02; D21D5/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1840917A
Cited
US811930A
Cited
DE380283C
Cited
US1559528A
Cited
US1856176A
Cited
GB336252A
Cited
DE707926C
Cited
US3363759A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-28 | 1973-01-27 | 1973-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-28 | 1977-01-27 | 1977-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-28 | 1981-01-27 | 1981-07-29 | $7700.00 | Window Closed / Lapsed |