Patent US2961926A successfully refreshed from Google Patents.
US2961926A
Expired / Lapsed
US
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Reflective devices having multi-curved surfaces
Assignee: Individual
•
Filing: 1955-03-08
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Granted: 1960-11-29
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Expires: 1975-03-08
Abstract
No abstract record available.
Inventors
- 👤 Ernst W Hoffmeister
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:39
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/08; G02B5/10; B; B29; B29D; B29D11/00; B29D11/00596; A; A63; A63G; A63G31/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US13615A
Cited
US835638A
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US1041329A
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US1166515A
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US1103631A
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US2044620A
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US2480031A
Cited
US2479204A
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US2804801A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-29 | 1964-05-30 | 1964-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-29 | 1968-05-30 | 1968-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-29 | 1972-05-30 | 1972-11-29 | $7700.00 | Window Closed / Lapsed |