US2772897A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Side delivery rotary fitting
Assignee: PERFECTING SERVICE CO
•
Filing: 1953-07-27
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Granted: 1956-12-04
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Expires: 1973-07-27
Abstract
No abstract record available.
Inventors
- 👤 Harmon L Shaw
- 👤 Frank E Frost
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:04
CPC Classifications
F; F16; F16L; F16L27/00; F16L27/08; F16L27/087; Y; Y10; Y10S; Y10S277/00; Y10S277/907; Y10T; Y10T279/00; Y10T279/17; Y10T279/17111
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-04 | 1960-06-04 | 1960-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-04 | 1964-06-04 | 1964-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-04 | 1968-06-04 | 1968-12-04 | $7700.00 | Window Closed / Lapsed |