US1815020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for separating sheet materials
Assignee: Seiberling Rubber Co
•
Filing: 1928-08-17
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Granted: 1931-07-14
•
Expires: 1948-08-17
Abstract
No abstract record available.
Inventors
- 👤 Harry S Alexander
- 👤 Fred B Pfeiffer
- 👤 John W White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:31
CPC Classifications
B; B29; B29C; B29C63/00; B29C63/0004; B29C63/0013; Y; Y10; Y10T; Y10T156/00; Y10T156/19; Y10T156/195
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) | 1934-07-13 | 1935-01-12 | 1935-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-07-13 | 1939-01-12 | 1939-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-07-13 | 1943-01-12 | 1943-07-14 | $7700.00 | Window Closed / Lapsed |