US2633629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of equipping wire line drums with spacing strips
Assignee: Standard Oil Development Co
•
Filing: 1950-11-01
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Granted: 1953-04-07
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Expires: 1970-11-01
Abstract
No abstract record available.
Inventors
- 👤 Robert R Crookston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:45
CPC Classifications
B; B66; B66D; B66D1/00; B66D1/28; B66D1/36; B66D2700/00; B66D2700/01; B66D2700/0183; B66D2700/0191; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49481; Y10T29/4949; Y10T29/49826; Y10T29/49863; Y10T29/49874
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US562644A
Cited
US1700181A
Cited
US756851A
Cited
US812063A
Cited
US1166536A
Cited
US1570061A
Cited
US2420050A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-06 | 1956-10-06 | 1957-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-06 | 1960-10-06 | 1961-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-06 | 1964-10-06 | 1965-04-07 | $7700.00 | Window Closed / Lapsed |