Patent US3055266A successfully refreshed from Google Patents.
US3055266A
Expired / Lapsed
US
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Microfilm viewing and copying apparatus
Assignee: GAF Chemicals Corp
•
Filing: 1958-02-14
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Granted: 1962-09-25
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Expires: 1978-02-14
Abstract
No abstract record available.
Inventors
- 👤 Frederick H Frantz
- 👤 Carl A Ackermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:26
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/10; G03B21/11; G03B21/118; Y; Y10; Y10T; Y10T83/00; Y10T83/202; Y10T83/2092; Y10T83/2096; Y10T83/2098; Y10T83/485; Y10T83/727; Y10T83/73; Y10T83/731; Y10T83/869; Y10T83/887; Y10T83/8871
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2388837A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-24 | 1966-03-26 | 1966-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-24 | 1970-03-26 | 1970-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-24 | 1974-03-26 | 1974-09-25 | $7700.00 | Window Closed / Lapsed |