Patent US2952889A successfully refreshed from Google Patents.
US2952889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expander and contractor roll
Assignee: Individual
•
Filing: 1956-10-22
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Granted: 1960-09-20
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Expires: 1976-10-22
Abstract
No abstract record available.
Inventors
- 👤 Hanssen Pierre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:59
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/36; D21F1/40; D06; D06C; D06C3/00; D06C3/06; D06C3/067
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB260172A
Cited
US1776382A
Cited
DE656033C
Cited
US2171185A
Cited
US2445638A
Cited
US2436719A
Cited
US2582280A
Cited
US2630897A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-20 | 1964-03-21 | 1964-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-20 | 1968-03-21 | 1968-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-20 | 1972-03-21 | 1972-09-20 | $7700.00 | Window Closed / Lapsed |