US3131046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple glazed window units
Assignee: Pilkington Group Ltd
•
Filing: 1958-06-16
•
Granted: 1964-04-28
•
Expires: 1978-06-16
Abstract
No abstract record available.
Inventors
- 👤 Dennett John
- 👤 Ashcroft Robert Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:15
CPC Classifications
C; C03; C03B; C03B23/00; C03B23/20; C03B23/24; C03B23/245; E; E06; E06B; E06B3/00; E06B3/66; E06B3/663; E06B3/66309; E06B3/66333; E06B3/673; E06B3/67339; E06B2003/66338; E06B3/6736; E06B3/67365; E06B3/67386
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-28 | 1967-10-28 | 1968-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-28 | 1971-10-28 | 1972-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-28 | 1975-10-28 | 1976-04-28 | $7700.00 | Window Closed / Lapsed |