US2947553A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe coupling for a pneumatic follow-up system
Assignee: Daystrom Inc
•
Filing: 1955-11-07
•
Granted: 1960-08-02
•
Expires: 1975-11-07
Abstract
No abstract record available.
Inventors
- 👤 Paul F K Erbguth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:02
CPC Classifications
F; F15; F15B; F15B9/00; F15B9/16; Y; Y10; Y10T; Y10T137/00; Y10T137/2278; Y10T137/2322
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-02 | 1964-02-01 | 1964-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-02 | 1968-02-01 | 1968-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-02 | 1972-02-01 | 1972-08-02 | $7700.00 | Window Closed / Lapsed |