Patent US2831131A successfully refreshed from Google Patents.
US2831131A
Expired / Lapsed
US
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Linear-motor paper feed
Assignee: International Business Machines Corp
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Filing: 1955-12-20
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Granted: 1958-04-15
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Expires: 1975-12-20
Abstract
No abstract record available.
Inventors
- 👤 Herman J Klotz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:22
CPC Classifications
H; H02; H02K; H02K41/00; H02K41/02; H02K41/025; B; B65; B65G; B65G23/00; G; G06; G06K; G06K13/00; G06K13/02; G06K13/07; B65G2811/00; B65G2811/09
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-14 | 1961-10-14 | 1962-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-14 | 1965-10-14 | 1966-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-14 | 1969-10-14 | 1970-04-15 | $7700.00 | Window Closed / Lapsed |