Patent US3387742A successfully refreshed from Google Patents.
US3387742A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chip changing apparatus
Assignee: Optical Coating Laboratory Inc
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Filing: 1966-01-24
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Granted: 1968-06-11
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Expires: 1986-01-24
Abstract
No abstract record available.
Inventors
- 👤 Nils H Bergfelt
- 👤 Vernon C Spellman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:56
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/22; C23C14/56
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) | 1971-06-11 | 1971-12-11 | 1972-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-11 | 1975-12-11 | 1976-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-11 | 1979-12-11 | 1980-06-11 | $7700.00 | Window Closed / Lapsed |