Patent US4051061A successfully refreshed from Google Patents.
US4051061A
Expired / Lapsed
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Gallium phosphide light emitting semiconductive materials
Assignee: Philips North America LLC
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Filing: 1973-08-10
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Granted: 1977-09-27
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Expires: 1993-08-10
Abstract
No abstract record available.
Inventors
- 👤 Rameshwar Nath Bhargaza
- 👤 Gertrude F Neumark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:03
CPC Classifications
H; H10; H10H; H10H20/00; H10H20/01; H10H20/011; H10H20/013; C; C30; C30B; C30B19/00; C30B19/02; C30B19/04; C30B29/00; C30B29/10; C30B29/40; C30B29/44
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) | 1980-09-26 | 1981-03-28 | 1981-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-26 | 1985-03-28 | 1985-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-26 | 1989-03-28 | 1989-09-27 | $7700.00 | Window Closed / Lapsed |