US2984899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of joining pipe sections by heating and subsequent cooling
Assignee: Dresser Industries Inc
•
Filing: 1956-03-12
•
Granted: 1961-05-23
•
Expires: 1976-03-12
Abstract
No abstract record available.
Inventors
- 👤 Richter Walther
- 👤 Risley Roger Emanuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:56
CPC Classifications
F; F16; F16L; F16L19/00; F16L19/02; F16L19/0212; F16L25/00; F16L25/02; F16L25/026; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49865
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) | 1964-05-22 | 1964-11-21 | 1965-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-22 | 1968-11-21 | 1969-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-22 | 1972-11-21 | 1973-05-23 | $7700.00 | Window Closed / Lapsed |