US3496686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Weather-tight enclosure system
Assignee: Birdair Structures Inc
•
Filing: 1967-11-30
•
Granted: 1970-02-24
•
Expires: 1987-11-30
Abstract
No abstract record available.
Inventors
- 👤 Walter W Bird
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:32
CPC Classifications
E; E04; E04H; E04H3/00; E04H3/10; E04H3/14; E04H3/16; E04H15/00; E04H15/20; E04H15/22; Y; Y10; Y10S; Y10S135/00; Y10S135/906
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1704945A
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US2923305A
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US2883676A
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US3059655A
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US3024796A
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US3150670A
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US3103050A
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US3158161A
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US3240217A
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US3247627A
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US3353309A
Cited
US3366977A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-23 | 1973-08-25 | 1974-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-23 | 1977-08-25 | 1978-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-23 | 1981-08-25 | 1982-02-24 | $7700.00 | Window Closed / Lapsed |