US2957371A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanical proportioning means
Assignee: Wang Laboratories Inc
•
Filing: 1958-12-15
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Granted: 1960-10-25
•
Expires: 1978-12-15
Abstract
No abstract record available.
Inventors
- 👤 Wang An
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:41
CPC Classifications
B; B23; B23K; B23K7/00; B23K7/002; B23Q; B23Q15/00; B23Q5/00; B23Q5/22; B23Q5/34; B23Q5/348; B24; B24B; B24B47/00; B24B47/02; B24B47/04; F; F16; F16H; F16H37/00; H; H03; H03M; H03M1/00; H03M1/12; H03M1/22; H03M1/24; H03M1/26; B23Q2705/00; B23Q2705/10; B23Q2705/18; B23Q2705/182; B23Q2705/185; F16H2700/00; F16H2700/02; Y; Y10; Y10T; Y10T74/00; Y10T74/13; Y10T74/131
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2521771A
Cited
US2902887A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-25 | 1964-04-25 | 1964-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-25 | 1968-04-25 | 1968-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-25 | 1972-04-25 | 1972-10-25 | $7700.00 | Window Closed / Lapsed |