US3521629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat and smoke protective hoods
Assignee: GT Schjeldahl Co
•
Filing: 1967-09-18
•
Granted: 1970-07-28
•
Expires: 1987-09-18
Abstract
No abstract record available.
Inventors
- 👤 Harold I Reynolds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:11
CPC Classifications
A; A62; A62B; A62B17/00; A62B17/04; Y; Y10; Y10S; Y10S428/00; Y10S428/92
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3136312A
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US728476A
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US996739A
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US1176313A
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US2561891A
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GB764335A
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US2710853A
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US2911038A
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US3132344A
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US3170811A
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US3330681A
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US3404033A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-27 | 1974-01-26 | 1974-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-27 | 1978-01-26 | 1978-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-27 | 1982-01-26 | 1982-07-28 | $7700.00 | Window Closed / Lapsed |