US2351579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for proportioning
Assignee: NAT TECHNICAL LAB
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Filing: 1941-11-22
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Granted: 1944-06-20
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Expires: 1961-11-22
Abstract
No abstract record available.
Inventors
- 👤 Arnold O Beckman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:03
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/42; C02F1/68; C02F1/685; C02F1/686; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0324; Y10T137/0329; Y10T137/0352; Y10T137/0363; Y10T137/2496; Y10T137/2499; Y10T137/2931; Y10T137/3115; Y10T137/4891; Y10T137/7287; Y10T137/7297; Y10T137/7313; Y10T137/7316; Y10T137/7319; Y10T137/7339; Y10T137/7349; Y10T137/7358; Y10T137/7361; Y10T137/7381; Y10T137/7394
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1947-06-20 | 1947-12-20 | 1948-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-06-20 | 1951-12-20 | 1952-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-06-20 | 1955-12-20 | 1956-06-20 | $7700.00 | Window Closed / Lapsed |