Patent US3494521A successfully refreshed from Google Patents.
US3494521A
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US
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Method and an apparatus for manufacturing a glass knife for a microtome
Assignee: Pfizer Health AB
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Filing: 1967-04-24
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Granted: 1970-02-10
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Expires: 1987-04-24
Abstract
No abstract record available.
Inventors
- 👤 Borje Thorstensson Hellstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 02:53
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/02; G01N1/04; G01N1/06; C; C03; C03B; C03B33/00; C03B33/02; C03B33/023; C03B33/027; C03B33/03; C03B33/033; G01N2001/061; Y; Y10; Y10T; Y10T225/00; Y10T225/30; Y10T225/307; Y10T225/321; Y10T225/325; Y10T225/371; Y10T225/379
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3207398A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-09 | 1973-08-11 | 1974-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-09 | 1977-08-11 | 1978-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-09 | 1981-08-11 | 1982-02-10 | $7700.00 | Window Closed / Lapsed |