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Patent US2923921A successfully refreshed from Google Patents.
US2923921A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shapin
Assignee: —
•
Filing: —
•
Granted: 1960-02-02
•
Expires: 1977-02-02
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:23
CPC Classifications
G; G06; G06F; G06F7/00; G06F7/02; Y; Y10; Y10S; Y10S707/00; Y10S707/99931
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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Cited
US2124906A
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US2295000A
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US2533326A
Cited
US2427383A
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US2539043A
Cited
US2501821A
Cited
US2609050A
Cited
US2482242A
Cited
US2615127A
Cited
US2641696A
Cited
US2721990A
Cited
US2776418A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-01 | 1963-08-03 | 1964-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-01 | 1967-08-03 | 1968-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-01 | 1971-08-03 | 1972-02-02 | $7700.00 | Window Closed / Lapsed |