Patent US3382128A successfully refreshed from Google Patents.
Patent US2326009A successfully refreshed from Google Patents.
US2326009A
Expired / Lapsed
US
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Glass prism
Assignee: A H Heisey & Co
•
Filing: 1939-12-29
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Granted: 1943-08-03
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Expires: 1959-12-29
Abstract
No abstract record available.
Inventors
- 👤 Ray C Cobel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:45
CPC Classifications
F; F21; F21V; F21V5/00; F21V5/06; Y; Y10; Y10T; Y10T24/00; Y10T24/44; Y10T24/44641; Y10T24/44769; Y10T24/44778
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) | 1946-08-02 | 1947-02-01 | 1947-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-08-02 | 1951-02-01 | 1951-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-08-02 | 1955-02-01 | 1955-08-03 | $7700.00 | Window Closed / Lapsed |