US2973000A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Consistency responsive device
Assignee: Riegel Paper Corp
•
Filing: 1956-01-31
•
Granted: 1961-02-28
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Expires: 1976-01-31
Abstract
No abstract record available.
Inventors
- 👤 Robert L Pearson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:48
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/08; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2499; Y10T137/2504; Y10T137/2506; Y10T137/8593; Y10T137/86187; Y10T137/86212
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US312314A
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US1178193A
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US1178194A
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US1178973A
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US1689755A
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US2445255A
Cited
US2658430A
Cited
US2704206A
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 |