US2954258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Domtar Inc
•
Filing: 1958-06-16
•
Granted: 1960-09-27
•
Expires: 1978-06-16
Abstract
No abstract record available.
Inventors
- 👤 Cook De Orr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:37
CPC Classifications
E; E21; E21B; E21B31/00; E21B31/12; E21B31/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US563054A
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US1193452A
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US1195463A
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US737101A
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US1383345A
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US2101815A
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US2514760A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-27 | 1964-03-28 | 1964-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-27 | 1968-03-28 | 1968-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-27 | 1972-03-28 | 1972-09-27 | $7700.00 | Window Closed / Lapsed |