US3015355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for forming spirally ribbed tubing
Assignee: General Gas Light Co
•
Filing: 1959-07-06
•
Granted: 1962-01-02
•
Expires: 1979-07-06
Abstract
No abstract record available.
Inventors
- 👤 Alfred H Humphrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:06
CPC Classifications
B; B21; B21D; B21D15/00; B21D15/04; F; F28; F28F; F28F2210/00; F28F2210/06; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4981
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1965-01-01 | 1965-07-03 | 1966-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-01 | 1969-07-03 | 1970-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-01 | 1973-07-03 | 1974-01-02 | $7700.00 | Window Closed / Lapsed |