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Patent US1539993A successfully refreshed from Google Patents.
US1539993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impression metal
Assignee: Lehmaier Schwartz & Co Inc
•
Filing: 1923-08-22
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Granted: 1925-06-02
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Expires: 1943-08-22
Abstract
No abstract record available.
Inventors
- 👤 Edwin J Conley
- 👤 George W Mullen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:17
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/24
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) | 1928-06-01 | 1928-12-01 | 1929-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-06-01 | 1932-12-01 | 1933-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-06-01 | 1936-12-01 | 1937-06-02 | $7700.00 | Window Closed / Lapsed |