Patent US2331337A successfully refreshed from Google Patents.
Patent US1729044A successfully refreshed from Google Patents.
US1729044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dilator
Assignee: ELECTRO THERMAL Co
•
Filing: 1927-11-14
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Granted: 1929-09-24
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Expires: 1947-11-14
Abstract
No abstract record available.
Inventors
- 👤 William J Kirk
- 👤 Roy H Brownlee
- 👤 William H Coburn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:30
CPC Classifications
A; A61; A61M; A61M29/00; A61F; A61F7/00; A61F7/12; A61F2007/0001; A61F2007/0018; A61F2007/0028; Y; Y10; Y10S; Y10S44/00; Y10S44/901; Y10S44/902
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) | 1932-09-23 | 1933-03-25 | 1933-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-09-23 | 1937-03-25 | 1937-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-09-23 | 1941-03-25 | 1941-09-24 | $7700.00 | Window Closed / Lapsed |