US1447247A
Expired / Lapsed
US
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Assignee: JOHN H WALTERS
•
Filing: 1920-07-10
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Granted: 1923-03-06
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Expires: 1940-07-10
Abstract
No abstract record available.
Inventors
- 👤 William G Hilsdorf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:35
CPC Classifications
B; B26; B26D; B26D1/00; B26D1/01; B26D1/04; B26D1/06; B26D1/08; B26D1/09; B26D1/095; B21; B21D; B21D28/00; B21D28/02; B26F; B26F1/00; B26F1/38; B26F1/40; Y; Y10; Y10T; Y10T83/00; Y10T83/222; Y10T83/869; Y10T83/8776; Y10T83/8785; Y10T83/8821; Y10T83/8828; Y10T83/8841; Y10T83/8843; Y10T83/8867; Y10T83/8868; Y10T83/929; Y10T83/9411; Y10T83/9447; Y10T83/9457; Y10T83/9473; Y10T83/9483; Y10T83/9486
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1926-03-05 | 1926-09-04 | 1927-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1930-03-05 | 1930-09-04 | 1931-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1934-03-05 | 1934-09-04 | 1935-03-06 | $7700.00 | Window Closed / Lapsed |