US3459274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound barrier structure and method of making same
Assignee: Monsanto Co
•
Filing: 1967-07-31
•
Granted: 1969-08-05
•
Expires: 1987-07-31
Abstract
No abstract record available.
Inventors
- 👤 David D Macphail Sr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:42
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/82; E04B1/84; E04B1/86; E04B2001/8457; E04B2001/8461; Y; Y10; Y10S; Y10S264/00; Y10S264/04; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249975
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3231439A
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US3386877A
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US3391051A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-04 | 1973-02-03 | 1973-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-04 | 1977-02-03 | 1977-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-04 | 1981-02-03 | 1981-08-05 | $7700.00 | Window Closed / Lapsed |