US2641958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and test equipment for measuring the quality of glass surfaces of unusually large dimensions under different supporting and loading conditions
Assignee: Individual
•
Filing: 1951-01-09
•
Granted: 1953-06-16
•
Expires: 1971-01-09
Abstract
No abstract record available.
Inventors
- 👤 Theodor W Zobel
- 👤 Mirus Ferdinand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:30
CPC Classifications
G; G01; G01B; G01B11/00; G01B11/30; G01B11/306
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1044502A
Cited
DE509310C
Cited
US2215211A
Cited
US2256855A
Cited
US2452364A
Cited
US2378930A
Cited
US2362235A
Cited
US2425758A
Cited
US2450839A
Cited
US2483244A
Cited
US2460836A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-15 | 1956-12-15 | 1957-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-15 | 1960-12-15 | 1961-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-15 | 1964-12-15 | 1965-06-16 | $7700.00 | Window Closed / Lapsed |