Patent US3304615A successfully refreshed from Google Patents.
US3304615A
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US
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Thickness measuring system
Assignee: Pittsburgh Glass Co
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Filing: 1963-02-28
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Granted: 1967-02-21
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Expires: 1983-02-28
Abstract
No abstract record available.
Inventors
- 👤 Cecil R Ward
- 👤 Frank J Rau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:00
CPC Classifications
G; G01; G01B; G01B7/00; G01B7/02; G01B7/06; G01B7/10; G01B7/107; C; C03; C03B; C03B15/00; C03B15/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1946924A
Cited
US2266620A
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US2511276A
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US2439595A
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US2876551A
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US3164981A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |