Patent US2845931A successfully refreshed from Google Patents.
US2845931A
Expired / Lapsed
US
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Sheet retaining device
Assignee: JEROME J PLUCKEBAUM
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Filing: 1955-09-22
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Granted: 1958-08-05
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Expires: 1975-09-22
Abstract
No abstract record available.
Inventors
- 👤 Jr John W Kinney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:48
CPC Classifications
B; B42; B42F; B42F13/00; B42F13/16; B42F13/165
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US172659A
Cited
US717787A
Cited
US1238410A
Cited
FR745030A
Cited
FR43586E
Cited
US2123625A
Cited
FR925068A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-04 | 1962-02-03 | 1962-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-04 | 1966-02-03 | 1966-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-04 | 1970-02-03 | 1970-08-05 | $7700.00 | Window Closed / Lapsed |