US2835167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photomicrographic apparatus
Assignee: Polaroid Corp
•
Filing: 1954-01-20
•
Granted: 1958-05-20
•
Expires: 1974-01-20
Abstract
No abstract record available.
Inventors
- 👤 Norton T Pierce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:14
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB166028A
Cited
US2077792A
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US2153010A
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US2339053A
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US2282643A
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US2404064A
Cited
US2483746A
Cited
US2757568A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-19 | 1961-11-18 | 1962-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-19 | 1965-11-18 | 1966-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-19 | 1969-11-18 | 1970-05-20 | $7700.00 | Window Closed / Lapsed |