Patent US2973153A successfully refreshed from Google Patents.
US2973153A
Expired / Lapsed
US
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Pulper
Assignee: Improved Machinery Inc
•
Filing: 1958-05-16
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Granted: 1961-02-28
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Expires: 1978-05-16
Abstract
No abstract record available.
Inventors
- 👤 John P Rich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:40
CPC Classifications
D; D21; D21B; D21B1/00; D21B1/04; D21B1/12; D21B1/30; D21B1/34; D21B1/345
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1207069A
Cited
US1675612A
Cited
US2592215A
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US2506882A
Cited
US2648261A
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US2674927A
Cited
US2641453A
Cited
US2824702A
Cited
US2852199A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-02-28 | 1964-08-29 | 1965-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-28 | 1968-08-29 | 1969-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-28 | 1972-08-29 | 1973-02-28 | $7700.00 | Window Closed / Lapsed |