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US2989276A
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US
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Assignee: CA Parsons and Co Ltd
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Filing: 1958-10-14
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Granted: 1961-06-20
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Expires: 1978-10-14
Abstract
No abstract record available.
Inventors
- 👤 Debbage Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:39
CPC Classifications
F; F16; F16L; F16L3/00; F16L3/16; F16L3/20; F16L3/205; F16L3/2056
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2535305A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |