US2811339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separable glass coated agitators
Assignee: Pfaudler Inc
•
Filing: 1955-12-02
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Granted: 1957-10-29
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Expires: 1975-12-02
Abstract
No abstract record available.
Inventors
- 👤 Alec V Osborne
- 👤 Charles W Webster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:22
CPC Classifications
A; A21; A21C; A21C1/00; A21C1/14; A21C1/1405; A21C1/141; B; B01; B01F; B01F27/00; B01F27/05; B01F27/051; A47; A47J; A47J43/00; A47J43/04; A47J43/07; B01F27/053; B01F27/0531; B01F27/07; B01F27/071; B01J; B01J19/00; B01J19/0053; B01J19/0066; B01J19/0073; B01J19/02; B01F27/11; B01F27/112; B01F27/1123; B01J2219/00; B01J2219/02; B01J2219/0204; B01J2219/0209
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) | 1960-10-28 | 1961-04-29 | 1961-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-28 | 1965-04-29 | 1965-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-28 | 1969-04-29 | 1969-10-29 | $7700.00 | Window Closed / Lapsed |