Patent US4373149A successfully refreshed from Google Patents.
Patent US2135873A successfully refreshed from Google Patents.
US2135873A
Expired / Lapsed
US
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Process of making metal reflectors
Assignee: Bausch and Lomb Inc
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Filing: 1934-11-22
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Granted: 1938-11-08
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Expires: 1954-11-22
Abstract
No abstract record available.
Inventors
- 👤 Frank L Jones
- 👤 Raymond J Kirchmaier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:22
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/06; C25; C25D; C25D1/00; C25D1/06; C03C2217/00; C03C2217/20; C03C2217/25; C03C2217/251; C03C2217/254; C03C2217/256; C03C2218/00; C03C2218/30; C03C2218/32; C03C2218/328; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49069
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) | 1941-11-07 | 1942-05-09 | 1942-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-11-07 | 1946-05-09 | 1946-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-11-07 | 1950-05-09 | 1950-11-08 | $7700.00 | Window Closed / Lapsed |