Patent US2543071A successfully refreshed from Google Patents.
US2543071A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seed for crystal growing
Assignee: Individual
•
Filing: 1948-06-08
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Granted: 1951-02-27
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Expires: 1968-06-08
Abstract
No abstract record available.
Inventors
- 👤 Stewart I Slawson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:50
CPC Classifications
C; C30; C30B; C30B29/00; C30B29/10; C30B29/14; C30B29/16; C30B29/18; C30B33/00; C30B33/06; C30B7/00; Y; Y10; Y10S; Y10S117/00; Y10S117/901; Y10S117/902
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) | 1954-02-26 | 1954-08-28 | 1955-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-26 | 1958-08-28 | 1959-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-26 | 1962-08-28 | 1963-02-27 | $7700.00 | Window Closed / Lapsed |