US2620289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of securing flexible sheets to relatively stiff backings
Assignee: 3M Co
•
Filing: 1945-08-27
•
Granted: 1952-12-02
•
Expires: 1965-08-27
Abstract
No abstract record available.
Inventors
- 👤 Donald J Douglas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:38
CPC Classifications
G; G09; G09F; G09F7/00; G09F7/16; G09F7/165; B; B29; B29C; B29C51/00; B29C51/16; B29C51/26; B29C51/28; B32; B32B; B32B27/00; B44; B44B; B44B5/00; B44B5/009; B29C43/00; B29C43/02; B29C43/10; B29C43/12; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1028; Y10T156/1089; Y10T156/109
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
THE METHOD OF SECURING A FLEXIBLE STRETCHABLE AIR-IMPERVIOUS SYNTHETIC RESIN SHEET TO A RELATIVELY RIGID AIR-IMPERVIOUS BACKING WHICH COMPRISES APPLYING TO AT LEAST ONE OF THE SURFACES TO BE BROUGHT TOGETHER A COATING OF HEATACTIVATABLE HEAT-SETTING ADHESIVE CAPABLE OF BE ING DRIED TO A SMOOTH NON-TACKY STATE AND SUBSEQUENTLY ACTIVATED AND SET BY HEAT, CAUSING THE SAID COATING TO DRY SUFFICIENTLY TO AFFORD A SMOOTH NON-ADHESIVE CONTRACT SURFACE, THEN SPREADING THE SHEET ON THE BACKING WITH THE SAID NON-TACKY COATING OF ADHESIVE BETWEEN THE SHEET AND THE BACKING, THEN WITHDRAWING AIR FROM BETWEEN THE SHEET AND BACKING WHILE APPLYING ATMOSPHERIC PRESSURE TO THE EXTERIOR SURFACE OF THE SAID SHEET TO CAUSE IT TO CONFORM TO THE BACKING AND HEATING HE WORK SUFFICIENTLY TO ACTIVATE AND SET THE ADHESIVE IN BONDING RELATION TO THE SHEET AND BACKING.
Claim 2
Independent Claim
136 words
THE METHOD OF SECURING A FLEXIBLE STRETCHABLE AIR-IMPERVIOUS SYNTHETIC RESIN SHEET TO A RELATIVELY RIGID AIR-IMPERVIOUS BACKING WHICH COMPRISES APPLYING TO AT LEAST ONE OF THE SURFACES TO BE BROUGHT TOGETHER A COATING OF HEATACTIVATABLE HEAT-SETTING ADHESIVE CAPABLE OF BE ING DRIED TO A SMOOTH NON-TACKY STATE AND SUBSEQUENTLY ACTIVATED AND SET BY HEAT, CAUSING THE SAID COATING TO DRY SUFFICIENTLY TO AFFORD A SMOOTH NON-ADHESIVE CONTRACT SURFACE, THEN SPREADING THE SHEET ON THE BACKING WITH THE SAID NON-TACKY COATING OF ADHESIVE BETWEEN THE SHEET AND THE BACKING, THEN WITHDRAWING AIR FROM BETWEEN THE SHEET AND BACKING WHILE APPLYING ATMOSPHERIC PRESSURE TO THE EXTERIOR SURFACE OF THE SAID SHEET TO CAUSE IT TO CONFORM TO THE BACKING AND HEATING HE WORK SUFFICIENTLY TO ACTIVATE AND SET THE ADHESIVE IN BONDING RELATION TO THE SHEET AND BACKING.
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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) | 1955-12-02 | 1956-06-02 | 1956-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-02 | 1960-06-02 | 1960-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-02 | 1964-06-02 | 1964-12-02 | $7700.00 | Window Closed / Lapsed |