Patent US2620172A successfully refreshed from Google Patents.
US2620172A
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Dispersion method and apparatus
Assignee: SELECTRONIC Corp
•
Filing: 1949-03-18
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Granted: 1952-12-02
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Expires: 1969-03-18
Abstract
No abstract record available.
Inventors
- 👤 Mittelmann Eugene
- 👤 Jenett Caroline Louise Maria
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:54
CPC Classifications
B; B29; B29B; B29B9/00; B29B9/02; B29B9/06; B29B7/00; B29B7/30; B29B7/34; B29B7/38; B29B7/40; B29B7/42; B29B7/421; B29B9/065; Y; Y10; Y10S; Y10S528/00; Y10S528/931
Claims Analysis
Total Claims: 0
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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) | 1955-12-02 | 1956-06-02 | 1956-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-02 | 1960-06-02 | 1960-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-02 | 1964-06-02 | 1964-12-02 | $7700.00 | Window Closed / Lapsed |