US3012373A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Level control means
Assignee: Owens Corning
•
Filing: 1957-12-30
•
Granted: 1961-12-12
•
Expires: 1977-12-30
Abstract
No abstract record available.
Inventors
- 👤 John H Willis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:56
CPC Classifications
G; G05; G05D; G05D9/00; G05D9/12; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0324; Y10T137/0363; Y10T137/6416; Y10T137/6606; Y10T137/7287; Y10T137/7722; Y10T137/7736
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2224403A
Cited
US2465283A
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US2470510A
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US2535569A
Cited
US2698539A
Cited
US2602125A
Cited
US2871874A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-11 | 1965-06-12 | 1965-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-11 | 1969-06-12 | 1969-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-11 | 1973-06-12 | 1973-12-12 | $7700.00 | Window Closed / Lapsed |