US2452142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Viscosity control
Assignee: ANNE G PECKER
•
Filing: 1942-12-23
•
Granted: 1948-10-26
•
Expires: 1962-12-23
Abstract
No abstract record available.
Inventors
- 👤 Joseph S Pecker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:05
CPC Classifications
D; D06; D06B; D06B23/00; D06B23/20; D06B23/205; B; B01; B01J; B01J19/00; B01J19/0006; B01J19/0013; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00087; B01J2219/00094; B01J2219/00103; B01J2219/00168; Y; Y10; Y10S; Y10S366/00; Y10S366/601; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2499; Y10T137/2506; Y10T137/6416; Y10T137/6579; Y10T137/7722
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1225086A
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US1334395A
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US1534091A
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US1715916A
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US1630714A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-10-26 | 1952-04-26 | 1952-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-10-26 | 1956-04-26 | 1956-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-10-26 | 1960-04-26 | 1960-10-26 | $7700.00 | Window Closed / Lapsed |