US2507543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pad construction
Assignee: HENRY L BURKITT
•
Filing: 1947-01-18
•
Granted: 1950-05-16
•
Expires: 1967-01-18
Abstract
No abstract record available.
Inventors
- 👤 Gerald A Prager
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:29
CPC Classifications
A; A41; A41D; A41D27/00; A41D27/26
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US207211A
Cited
GB189601913A
Cited
US2329496A
Cited
US2400210A
Cited
US2420799A
Cited
US2424482A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-15 | 1953-11-14 | 1954-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-15 | 1957-11-14 | 1958-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-15 | 1961-11-14 | 1962-05-16 | $7700.00 | Window Closed / Lapsed |