US2528731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bellows trimming machine
Assignee: Robertshaw Controls Co
•
Filing: 1947-10-01
•
Granted: 1950-11-07
•
Expires: 1967-10-01
Abstract
No abstract record available.
Inventors
- 👤 Samuel W Steele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:38
CPC Classifications
B; B23; B23D; B23D31/00; B23D31/001; Y; Y10; Y10T; Y10T29/00; Y10T29/51; Y10T29/5124; Y10T29/5127; Y10T29/5128; Y10T82/00; Y10T82/16; Y10T82/16426; Y10T82/16967; Y10T83/00; Y10T83/202; Y10T83/2066; Y10T83/2068
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US972828A
Cited
US1934660A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-06 | 1954-05-08 | 1954-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-06 | 1958-05-08 | 1958-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-06 | 1962-05-08 | 1962-11-07 | $7700.00 | Window Closed / Lapsed |