US2969837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suction roll construction
Assignee: LAYTON GREENFIELD Inc
•
Filing: 1958-06-10
•
Granted: 1961-01-31
•
Expires: 1978-06-10
Abstract
No abstract record available.
Inventors
- 👤 John H Reynar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:05
CPC Classifications
D; D21; D21F; D21F3/00; D21F3/02; D21F3/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1800149A
Cited
US2062238A
Cited
US2338465A
Cited
US2290777A
Cited
US2578551A
Cited
US2691814A
Cited
US2715617A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-31 | 1964-08-01 | 1965-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-31 | 1968-08-01 | 1969-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-31 | 1972-08-01 | 1973-01-31 | $7700.00 | Window Closed / Lapsed |