US2612581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Welding rod
Assignee: Airco Inc
•
Filing: 1950-02-11
•
Granted: 1952-09-30
•
Expires: 1970-02-11
Abstract
No abstract record available.
Inventors
- 👤 Robinson Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:57
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/02; B23K35/0255; B23K35/0261; B23K35/0283; B23K35/22; B23K35/24; B23K35/30; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/929; Y10T; Y10T428/00; Y10T428/12; Y10T428/12333; Y10T428/12493; Y10T428/12736; Y10T428/1275
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1437257A
Cited
GB302064A
Cited
US2184716A
Cited
US2301320A
Cited
US2261779A
Cited
US2319977A
Cited
US2320676A
Cited
US2430419A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-30 | 1956-03-31 | 1956-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-30 | 1960-03-31 | 1960-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-30 | 1964-03-31 | 1964-09-30 | $7700.00 | Window Closed / Lapsed |