US2778503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quick-couplers for securing oilrefining elements in housings
Assignee: Individual
•
Filing: 1953-06-22
•
Granted: 1957-01-22
•
Expires: 1973-06-22
Abstract
No abstract record available.
Inventors
- 👤 Albert R White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:29
CPC Classifications
B; B01; B01D; B01D27/00; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D29/50; B01D29/52; B01D2201/00; B01D2201/04; B01D2201/043; B01D2201/0446
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US408487A
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US1950487A
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US2369857A
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US2379582A
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US2453952A
Cited
US2487769A
Cited
US2451067A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-22 | 1960-07-23 | 1961-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-22 | 1964-07-23 | 1965-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-22 | 1968-07-23 | 1969-01-22 | $7700.00 | Window Closed / Lapsed |