US2880650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical glass domes
Assignee: Individual
•
Filing: 1954-02-18
•
Granted: 1959-04-07
•
Expires: 1974-02-18
Abstract
No abstract record available.
Inventors
- 👤 Walter A Fraser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:41
CPC Classifications
G; G02; G02B; G02B3/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US578620A
Cited
US591466A
Cited
US925824A
Cited
US896631A
Cited
US1504970A
Cited
US1952237A
Cited
US2610593A
Cited
US2705349A
Cited
US2703060A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-06 | 1962-10-06 | 1963-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-06 | 1966-10-06 | 1967-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-06 | 1970-10-06 | 1971-04-07 | $7700.00 | Window Closed / Lapsed |