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US3458707A
Expired / Lapsed
US
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Mask for flow detector which prevents end of material from being confused with flaw
Assignee: GAF Corp
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Filing: 1968-01-16
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Granted: 1969-07-29
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Expires: 1988-01-16
Abstract
No abstract record available.
Inventors
- 👤 Gordon W Nichols
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:04
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/0007; G; G03; G03B; G03B35/00; G03B35/18; G03B35/24; G03C; G03C1/00; G03C1/74
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3061731A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-28 | 1973-01-27 | 1973-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-28 | 1977-01-27 | 1977-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-28 | 1981-01-27 | 1981-07-29 | $7700.00 | Window Closed / Lapsed |