US2624236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polarizing attachment for microscopes
Assignee: Wyeth Holdings LLC
•
Filing: 1949-02-05
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Granted: 1953-01-06
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Expires: 1969-02-05
Abstract
No abstract record available.
Inventors
- 👤 Kirkpatrick Alan Fred
- 👤 Stryker Charles Rule
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:22
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/0004
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) | 1956-01-06 | 1956-07-07 | 1957-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-01-06 | 1960-07-07 | 1961-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-01-06 | 1964-07-07 | 1965-01-06 | $7700.00 | Window Closed / Lapsed |