Patent US3111570A successfully refreshed from Google Patents.
US3111570A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass sandwiches primarily for windows of optical instruments
Assignee: Individual
•
Filing: 1958-12-18
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Granted: 1963-11-19
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Expires: 1978-12-18
Abstract
No abstract record available.
Inventors
- 👤 Strang John Martin
- 👤 Davy John Rupert
- 👤 Hope Alexander James Napier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:58
CPC Classifications
B; B29; B29D; B29D11/00; B29D11/0074; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31515; Y10T428/31518; Y10T428/31725
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
AN OPTICAL INSTRUMENT INCLUDING A LENS SYSTEM INVOLVING OPTICAL MAGNIFICATION AND A LAMINATED GLASS WINDOW, SAID GLASS WINDOW COMPRISING AT LEAST TWO GLASS LAMINATIONS, AN ADHESIVE OF THERMO-SETTING TRANSPARENT OPTICAL EPOXY RESIN CEMENT AND A CURING AGENT LOCATED DIRECTLY BETWEEN SAID LAMINATIONS, AND HEATING MEANS FOR THE INSTRUMENT, SAID HEATING MEANS COMPRISING THIN WIRE ELEC-
Claim 2
Dependent Claim
55 words
AN OPTICAL INSTRUMENT INCLUDING A LENS SYSTEM INVOLVING OPTICAL MAGNIFICATION AND A LAMINATED GLASS WINDOW, SAID GLASS WINDOW COMPRISING AT LEAST TWO GLASS LAMINATIONS, AN ADHESIVE OF THERMO-SETTING TRANSPARENT OPTICAL EPOXY RESIN CEMENT AND A CURING AGENT LOCATED DIRECTLY BETWEEN SAID LAMINATIONS, AND HEATING MEANS FOR THE INSTRUMENT, SAID HEATING MEANS COMPRISING THIN WIRE ELEC-
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-11-18 | 1967-05-20 | 1967-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-18 | 1971-05-20 | 1971-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-18 | 1975-05-20 | 1975-11-19 | $7700.00 | Window Closed / Lapsed |